Q116 / 120 · VITEEE 2010 · Physics

Radio waves diffract around building althrough light waves do not. The reason is that radio waves

A
travel with speed larger than c
Correct answer
B
have much larger wavelength then light
C
carry news
D
are not electromagnetic waves

Solution

Diffraction takes places when the wavelength of waves is comparable with the size of the obstacle in path. $\mathrm{P}_{\text {radio }}>\mathrm{P}_{\text {light }}$ Hence, radio waves are diffracted around building.

Hence, the correct answer is option: 'B'.

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