The momentum of a photon of energy 1 MeV in kg m/s, will

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The momentum of a photon of energy 1 MeV in kg m/s, will be

1. 7 × 10^–24
2. 10^–22
3. 5 × 10^–22
4. 0.33 × 10⁶

Correct Option: C

1 MeV = 10⁶ × 1.6 × 10^–19 joule Momentum of photon

=	E	=	1.6 × 10^–13
	c		3 × 10⁸

=	1.6	× 10^–21 =	16	× 10^–22
	3		3

= 5 × 10^–22 kg m/sec