Question

a, b, c, d are electromagnetic radiations. Frequencies of a, b, c are $3 \times 10^{15$ Hz, respectively, whereas the wavelength of c, d are 400 nm, 750 nm, respectively. The increasing order of their energies is}

• A. b, d, c, a
• B. a, b, c, d
• C. a, c, b, d
• D. b, c, d, a

Hint:

Remember, higher frequency corresponds to higher energy, and shorter wavelength also corresponds to higher energy.

Answer 1

The Correct Option is A

The energy of electromagnetic radiation is directly proportional to the frequency and inversely proportional to the wavelength. Since $E = h \nu = \frac{hc}{\lambda}$, the increasing order of energies is determined by the given frequencies and wavelengths.