Give the value of speed and rest mass of photon . Determine the wavelength of photon energy `10^(10)` eV
(Given `h=6.625xx10^(-34)` J s)

Explanation

To solve the problem, we will follow these steps:

### Step 1: Determine the speed and rest mass of a photon.
- The speed of a photon (c) is the same as the speed of light, which is approximately \(3 \times 10^8\) meters per second.
- The rest mass of a photon is zero.

**Answer:**
- Speed of photon, \(c = 3 \times 10^8 \, \text{m/s}\)
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