A radiation of frequency `v_0` falls at an incident angle of `30^@` on a perfectly reflecting surface. Calculate the change in the momentum .

Explanation

To calculate the change in momentum of radiation falling on a perfectly reflecting surface, we can follow these steps:

### Step 1: Understand the relationship between momentum and frequency
The momentum \( p \) of a photon is given by the formula:
\[ p = \frac{E}{c} \]
where \( E \) is the energy of the photon and \( c \) is the speed of light. The energy \( E \) of a photon can also be expressed in terms of its frequency \( v_0 \):
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