Q.

• 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.

Answer: A is false but R is true
Notes: Assertion (A) is false: In the visible spectrum, energy of a photon is inversely proportional to wavelength (E = hc/λ). Green light (~550 nm) has shorter wavelength than red light (~650-700 nm), so green light is more energetic than red. Reason (R) is true: Red light indeed has longer wavelength than green. R does not explain A, as higher wavelength means lower energy.