Question
Consider the following statements: Assertion (A):
In the visible spectrum of light, red light has more energy than green light. Reason (R): The wavelength of red light is greater than that of green light. Choose the correct answer from the codes given below:Solution
тАв Red light has a longer wavelength compared to green light; thus, Reason (R) is correct. тАв However, energy is inversely proportional to wavelength (E тИЭ 1/╬╗). This means shorter wavelength light has more energy than longer wavelength light. тАв Therefore, green light has more energy than red light, making Assertion (A) false. Thus, the correct answer is (d) A is false, but R is true. яГШ Energy of light is given by the formula E = h╬╜ = hc/╬╗, where h = PlanckтАЩs constant, ╬╜ = frequency, c = speed of light, and ╬╗ = wavelength. яГШ In the visible spectrum, violet light has the highest energy, and red light has the lowest. яГШ Wavelength order (longest to shortest): Red > Orange > Yellow > Green > Blue > Indigo > Violet. яГШ Energy order (lowest to highest): Red < Orange < Yellow < Green < Blue < Indigo < Violet. яГШ Green light has a shorter wavelength than red, so it carries more energy. яГШ Red light is used in night vision equipment because of its low energy and low scattering property. яГШ Green light is more energetic and is often used in applications like laser pointers and signaling.
He noted various policy reforms of the government aimed at increasing exploration in new sedimentary basins.
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