GS PrelimsScience and TechnologyGeneral Science2008

Assertion (A) : In the visible spectrum of light, red light is more energetic than green light. Reason (R) : The wavelength of red light is more than that of green light.

A

Both A and R are individually true and R is the correct explanation of A

B

Both A and R are individually true but R is not the correct explanation of A

C

A is true but R is false

D

A is false but R is true

Correct Answer: Option D

Explanation

1. Assertion (A): Within the visible spectrum of light, the energy of light is inversely proportional to its wavelength (E = hc/λ). Red light has a longer wavelength than green light, meaning it has lower frequency and lower energy. Therefore, the statement that red light is more energetic than green light is false. Assertion (A) is false. 2. Reason (R): The wavelength of red light (approx. 620-750 nm) is indeed more than that of green light (approx. 495-570 nm). Reason (R) is true.

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