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which has higher energy a photon of red light with wavelength 7500 angsron or a photon of green light with wavelength of 5250angsron

Posted by Agent Wolf 5 years ago

CBSE > Class 11 > Chemistry

1 answers

Agent Wolf 5 years ago

Wavelength of red light (λ) = 7500 A∘ = 7500×10−10 m As we know : Energy of light = hcλ where h (planck's constant) = 6.626×10−34Jsand c (speed of light) = 3×108m/s ∴ Energy = 6.626×10−34Js ×3×108m/s7500×10−10m = 2.6504 × 10−19J and for green light wavelength (λ) = 5250 A∘ = 5250×10−10 m ∴ Energy = 6.626×10−34Js ×3×108m/s5250×10−10m = 3.7863 × 10−19J Thus red light with greater wavelength has lower energy than green light.

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