Question

which of the following statements is true? a the energy of violet light is higher than energy of red light because the frequency of the violet light is lesser than freq. of red light b the energy of violet light is lower than energy of red light because the frequency of the violet light is higher than freq. of red light c the energy of violet light is lower than energy of red light because the frequency of the violet light is higher than freq. of red light d the energy of violet light is higher than energy of red light because the frequency of the violet light is higher than freq. of red light

Explanation:

To determine the true statement, we use the formula for the energy of a photon, \( E = h
u \), where \( E \) is energy, \( h \) is Planck's constant, and \(
u \) is frequency. Violet light has a higher frequency (\(
u \)) than red light. From \( E = h
u \), higher frequency means higher energy.

• Option A: Claims violet frequency is less (false) and energy higher (contradicts \( E \propto

u \)), so wrong.

• Option B: Claims violet energy is lower (false, since \(

u \) is higher, \( E \) should be higher), so wrong.

• Option C: Same as B, wrong.
• Option D: States violet energy is higher (correct, as \(

u \) is higher) and explains with higher frequency (correct), so this is true.

Answer:

D. the energy of violet light is higher than energy of red light because the frequency of the violet light is higher than freq. of red light