Intensity of Light

Summary

Muni Nandighoshvijay explores how Jain philosophy aligns with modern physics regarding light. He notes that Jains accept the scientific position that the intensity of light depends on the number of photons or radiant particlesfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=With%20regard%20to%20light%2C%20as,and%20light%20receiving%20surface%20increases. Intensity varies inversely with the square of the distance between the light source and the receiving surface because as distance increases, fewer photons are receivedfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=distance%20between%3Athe%20source%20of%20light,received%20by%20that%20surface%20decreases. The author presents formulas expressing intensity (I) as i/d² and as k/d², where k reflects the total photons emitted per unit time and depends on the emissive power of the sourcefile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=I%20,upon%20emissive%20power%20and%20light. Further relations show I as e·c/(t·d²), incorporating constants such as the Stefan‑Boltzmann constant and the velocity of lightfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=I%3D%C2%A2%20%C2%A2%20c%2Ft,source%20of%20light%20and%20light. He discusses how photon scattering reduces intensity in proportion to the inverse of the distance and provides a formula for motion-related effects such as the Doppler shiftfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=But%20as%20photons%20are%20scattered,each%20other%2C%20their%20velocity%20will. The article explains that in electrical contexts, light intensity correlates with bulb wattage; higher wattage means greater light intensityfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=In%20electricity%2C%20intensity%20of%20light,than%20that%20of%2040%20watt. Electrical resistance is expressed as ρl/a, where ρ is specific resistance, l is filament length and a is cross-sectional areafile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=But%20W%3D13%20R%20where%20W%3Dwatts%2C,a%3Darea%20of%208. Thus, longer filaments yield higher resistance and higher wattage if the current is constantfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=might%20be%20same%20forever%20than,be%20any%20change%20current%201. The author does not consider temperature effects, arguing that temperature affects photon frequency rather than intensityfile:///home/oai/share/jain_journal_1993_07_520111_hr6_ocred.pdf#:~:text=Absolute%20temprature%20has%20not%20been,the%20frequency%20of%20each%20photon. Through these explanations, he links Jain acceptance of physical laws with contemporary science, illustrating how Jain thought engages with natural philosophy.