PLS FOUNDATION
Reference portal: image credits
Photographs, manuscripts and teaching diagrams, with sources, creator credits and reuse licences.
Hampi, Karnataka
Ingo Mehling · Source page
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An everyday family moment
PR Kavitha · Source page
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A dog family at Lal Bagh, Bengaluru
Framesnlight · Source page
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A vernier caliper for measuring dimensions.
Santeri Viinamäki · Source page
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Copper(II) sulfate pentahydrate crystals.
Crystal Titan · Source page
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Leaf veins photographed in Chiavari, Italy, in 2016.
Alessandro Puzielli · Source page
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Solar panels and electricity infrastructure in India, 2026.
Manjunatha G, WELL Labs · Source page
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A computer class near Baroda, Gujarat, photographed in January 2007.
© Yann Forget / Wikimedia Commons · Source page
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Tailoring work in Varanasi, India; photographed in 2005.
© Jorge Royan / http://www.royan.com.ar · Source page
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State Central Library, Hyderabad; photographed in December 2024.
Saiphani02 · Source page
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A memorial sculpture of Savitribai Phule at Maharashtra Sadan, New Delhi. Photograph: Ashish Bhatnagar, 19 March 2017.
आशीष भटनागर (Ashish Bhatnagar) · Source page
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A memorial bust of B. R. Ambedkar in Mahabaleshwar, Maharashtra. Photograph: Snehrashmi (Vijay Barot), 25 November 2019.
Snehrashmi (Vijay Barot) · Source page
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Rabindranath Tagore in a 1916 photograph preserved by the Library of Congress, catalogue 99403031.
Library of Congress · photographer unrecorded · Source page
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Sarojini Naidu in the portrait published with The Bird of Time in 1912. The photographer is unknown.
Unknown photographer · Source page
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C. V. Raman in a portrait dated 1930 in the Nobel Foundation source record on Wikimedia Commons.
Nobel Foundation · Source page
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Janaki Ammal in a portrait published in The Modern Review, February 1938. The photographer is unknown.
Unknown photographer; The Modern Review, February 1938 · Source page
Public domain (Commons: PD-India)
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Srinivasa Ramanujan in a passport photograph catalogued as [1913], Trinity College, Cambridge, Add.Ms.a.94.7.
Unknown photographer; Trinity College, Cambridge · Source page
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Vikram Sarabhai (left) and Thomas O. Paine signing a satellite education agreement, 18 September 1969. NASA photograph GPN-2002-000081.
NASA · Source page
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Monsoon cloud over the Western Ghats at Bettada Bhyraveshwara, near Sakleshpur, Karnataka.
Rakdept · Source page
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Rock columns along the shore of St Mary’s Islands, Karnataka.
Greeshma Pathri Suresh · Source page
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Two six-sided dice provide a concrete way to count possible outcomes, express proportions and compare repeated samples.
Schlurcher · Source page
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A laboratory demonstration of microplastic flocculation using fenugreek polymer. It illustrates separation research; it is not the hydrogel experiment discussed in this lesson.
JosephTarletonTX · Source page
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A rice field in Wayanad, Kerala. The photograph shows the crop context; it does not identify a genome-edited variety or the field trial described in the lesson.
Unnimaya5 · Source page
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A MegaBACE DNA sequencing instrument. Sequencing equipment turns laboratory measurements into sequence data; this is an illustrative instrument, not a photograph of the IndiGenomes project.
Nels A. Olson · Source page
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An Intel A80386DX-25 processor package, shown as an example of a manufactured processor. It is not the SHAKTI MOUSHIK chip.
Mister rf · Source page
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Buzz Aldrin’s Apollo 11 photograph of a bootprint in lunar regolith, 1969. It illustrates the Moon’s loose surface material; it is not a Chandrayaan-3 image.
NASA / Buzz Aldrin · Source page
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A hollow concrete block photographed in Japan. Its outer dimensions and voids matter when estimating volume and material use. The photograph makes no claim that this block stores captured carbon.
katorisi · Source page
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A soil profile with an argillic horizon near Raleigh, North Carolina. Layers and their depths help describe soil formation and the material through which water moves.
Cjrufe · Source page
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A USDA weather station used to record environmental measurements. Repeated measurements help distinguish daily weather from longer trends and compare related variables.
USDA photo by Scott Bauer. Image Number K7688-7 · Source page
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A laboratory thermometer with a graduated scale. Temperature readings require units; converting between Celsius and Fahrenheit is an example of a linear function.
Lilly_M · Source page
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Tuning forks made for different frequencies. A vibrating fork transfers energy to the surrounding air and produces sound.
K.Venkataramana · Source page
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A diagram of the human digestive tract. Follow the route from mouth to stomach and intestines, and distinguish the passage of food from the work of supporting organs.
Mariana Ruiz, Jmarchn · Source page
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A simplified diagram of human circulation. Red and blue are diagram conventions for different blood pathways; human blood is not blue.
LadyofHats, Mariana Ruiz Villarreal · Source page
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A two-pan balance provides a physical model of equality: adding the same mass to both sides preserves balance.
Lilly_M · Source page
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A bouncing ball photographed with 25 stroboscopic flashes per second. The spacing reveals changes in speed, and the lower second bounce shows energy transferred away from the ball’s mechanical motion.
MichaelMaggs; edited by Richard Bartz · Source page
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Light refracted and dispersed by glass prisms. Changes in direction and the separation of colours can be observed in the same optical setup.
Sobolishko · Source page
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Onion epidermal cells viewed through a microscope. Microscopy reveals structures at scales much smaller than everyday objects; a scale bar or calibrated magnification is needed to measure their size.
Katekor1 · Source page
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A Ganges river dolphin at the water surface. Brief sightings help explain why survey effort and detectability matter when estimating a river population.
Kukil Gogoi · Source page
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A 5 ml Covaxin (BBV152) vial photographed in Bihar in May 2021. A product photograph identifies the vaccine; its efficacy must be assessed from trial data.
DTM · Source page
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A graben north of Mukalla, Yemen, associated with rifting of the Gulf of Aden. Faulting and displaced rock layers preserve evidence of crustal movement.
Benoit hauville · Source page
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A nineteenth-century Bhagavad Gita manuscript from North India, in the Library of Congress collection.
Unknown manuscript maker; Library of Congress · Source page
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An 1860s manuscript copy of the Maitrayaniya Upanishad in Sanskrit and Devanagari; photographed in 2018. The manuscript is a later copy of the text.
Ms Sarah Welch · Source page
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Buddhist monuments at Sanchi, Madhya Pradesh, photographed on 17 March 2011.
Nandanupadhyay · Source page
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An annual veterinary check-up at Yokota Air Base, Japan, in 2007.
SrA Veronica Pierce / U.S. Air Force · Source page
Public domain (U.S. Air Force)
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An accessible entrance at University College of Medical Sciences, photographed in 2013.
Dr Satendra · Source page
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A desktop workspace photographed in 2016.
Radek Grzybowski · Source page
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A YubiKey USB security device photographed in 2011.
Dennis · Source page
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A spreadsheet simulation on a laboratory laptop, photographed in 2023.
MikeRun (Michael A. Rundel) · Source page
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A study room at the Goa State Central Library, photographed in 2017.
Indira Rane · Source page
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A NAVFAC Hawaii Planning Branch team meeting, photographed in 2012.
Krista K. Catian / NAVFAC Pacific Public Affairs · Source page
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Working donkeys carrying bricks in Agra, India, photographed in 2015.
Philip Nalangan · Source page
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U.S. Navy personnel take part in a beach cleanup on Diego Garcia, 15 July 2023.
Seaman Raquell Williams / U.S. Navy · Source page
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A Sanskrit manuscript page from the Tattva Deepika commentary on the Ramayana’s Bala Kanda, in Devanagari; photographed in 2018.
Ms Sarah Welch · Source page
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A palm-leaf manuscript of the Mahabharata’s Drona Parvan: Sanskrit written in Grantha script, from the Whish collection.
Ms Sarah Welch · Source page
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Selected, non-sequential pages from an eighteenth-century Yoga Sutra manuscript with commentary, held at the University of Pennsylvania.
Ms Sarah Welch · Source page
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The opening ten Nyaya Sutras, reproduced from an 1896 printed edition; photographed in 2016.
Ms Sarah Welch · Source page
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The Jain temple at Ranakpur, Rajasthan, dedicated to Rishabhanatha (Adinath); photographed in November 2019.
Ninara · Source page
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Rani ki Vav, the historic stepwell at Patan, Gujarat; photographed in January 2023.
Ninara · Source page
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An artisan weaving mulberry silk on a handloom in West Bengal, photographed in March 2025.
DaredevilP · Source page
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Diwali lamps in West Bengal, photographed in November 2021.
Pinakpani · Source page
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Railway platforms at Chhatrapati Shivaji Maharaj Terminus, Mumbai, photographed in December 2022.
Rajendra B. Aklekar · Source page
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A group of Bharatanatyam dancers, photographed in April 2025.
Prathvi Acharya · Source page
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Chinese fishing nets at Kochi, Kerala, photographed in October 2021; a present-day coastal scene.
Ppyoonus · Source page
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Ravi Shankar and Anoushka Shankar in a sitar concert, 28 October 2005.
Revanta Banerji · Source page
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A manuscript painting depicting Ravidas and Kabir beneath a tree, Wellcome Library image L0024542. This is an artistic depiction, not a life portrait.
Unknown artist; Wellcome Library, London · Source page
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A published facsimile of Ashoka’s rock edicts at Girnar. This is a documentary reproduction of the lettering, not a photograph of the rock.
Aśoka; Alexander Cunningham; Eugen Hultzsch (Commons attribution) · Source page
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A rose-ringed parakeet in the Western Ghats, Kerala, photographed in December 2021.
Kandukuru Nagarjun · Source page
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A portable emergency-supplies bag in a Madison County preparedness photograph, 2021.
PEO ACWA · Source page
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The Preamble in the original calligraphic Constitution of India, 1949. This historical page predates later amendments to its wording.
Illumination: Beohar Rammanohar Sinha; calligraphy: Prem Behari Narain Raizada · Source page
Public domain (Commons PD-India)
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Ganesha, Tamil Nadu, 12th century, Chola period; copper alloy. The Metropolitan Museum of Art, 2015.500.4.12.
Unknown sculptor; image: The Metropolitan Museum of Art · Source page
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Shiva as Lord of Dance (Nataraja), Tamil Nadu, late 11th century; copper alloy. The Metropolitan Museum of Art, 1987.80.1.
Unknown sculptor; image: The Metropolitan Museum of Art · Source page
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Vishnu with Lakshmi and Sarasvati, Bihar, second half of the 11th century, Pala period; black stone. The Metropolitan Museum of Art, 1987.178.
Unknown sculptor; image: The Metropolitan Museum of Art · Source page
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Durga slaying Mahisha, northern Bengal in present-day Bangladesh, about the 12th century; copper alloy. The Metropolitan Museum of Art, 2020.399.
Unknown sculptor; image: The Metropolitan Museum of Art · Source page
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Jawaharlal Nehru in a historical photograph from the Walter Nash papers, shared by Archives New Zealand. Cropped portrait; original photograph date unspecified.
Archives New Zealand; Commons crop by Kaythehistorian · Source page
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A. P. J. Abdul Kalam, photographed on 26 August 2008 by Lijesh K.
Lijesh K; Commons crop and contrast adjustments by Materialscientist and Kalki · Source page
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Vallabhbhai Patel as a district pleader in Borsad, about 1903; unknown photographer.
Unknown photographer; source shared by PIB Home Affairs, Government of India · Source page
Public domain (Commons PD-India)
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Samrat Yantra at Jaipur’s 18th-century Jantar Mantar observatory, photographed in November 2017. This later astronomy instrument is not associated with Aryabhata personally.
Swapnil.Karambelkar · Source page
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A pH indicator strip compared with its printed colour scale.
Michael Krahe · Source page
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A graphite specimen with a mechanical pencil, from the Auckland Museum collection.
Auckland Museum Collections · Source page
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The historic Parliament House in New Delhi, photographed in 2014.
Nikhil B (Nikhilb239) · Source page
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Dancing Ganesha, Madhya Pradesh, about the 10th century, Kalacuri dynasty; red sandstone. The Metropolitan Museum of Art, 2007.480.2.
Unknown sculptor; image: The Metropolitan Museum of Art · Source page
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Shiva and His Family, Kangra, Himachal Pradesh, early 19th century; opaque watercolor with gold and silver paint on paper. The Walters Art Museum, W.907.
Unknown Indian artist; image: The Walters Art Museum · Source page
Public domain; museum record also designates CC0
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Kesari Wada Sarvajanik Ganeshotsav Mandal, Pune, Maharashtra; photographed by Pooja Jadhav on 28 September 2023.
Pooja Jadhav · Source page
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Hanuman ji brings the mountain to Shri Lakshmana in this Kalighat painting, illustrating a later Ramayana episode.
Wellcome Library, London · Source page
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An Isha Upanishad manuscript, folio 1r, Wellcome MS Indic 37.
Wellcome Library, London · Source page
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Swami Vivekananda in Chicago, September 1893; portrait with handwritten text and signature.
Unknown photographer, via Wikimedia Commons · Source page
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