Ncert Exercises & Solutions

What is the wavelength of the electromagnetic radiation, as shown in the hypothetical wave in the figure below?

1. 8.64 pm
2. 4.32 pm
3. 1.08 pm
4. 6.48 pm

Hint: The wavelength (λ) of radiation is the distance between two successive peaks or crusts.

Wavelength is the distance between two successive peaks or two successive throughs of a wave.

Therefore,

λ = 4 \times 2.16 pm = 8.64 pm

= 8.64 \times 10^{- 12} m [∵ 1 pm = 10^{- 12} m]