If wavelength of photon is 2.2 × 10-11 m and h =6.6 × 10-34 Js, then momentum of photon

Question

If wavelength of photon is 2.2 × 10-11 m and h =6.6 × 10-34 Js, then momentum of photon (A) 1.452 × 10-44 kg ms -1 (B) 6.89 × 1043 kg m s -1 (C) 3 × 10-23 kg m s -1 (D) 3.33 × 10-22 kg m s -1

Tardigrade Admin · Accepted Answer

λ=( h / mv )=( h / p ) p =( h /λ)=(6.6 × 10-34/2.2 × 10-11)=3 × 10-23

Q. If wavelength of photon is $2.2 \times 1 0^{- 11} m$ and $h = 6.6 \times 1 0^{- 34} J s$ , then momentum of photon

$1.452 \times 1 0^{- 44} k g m s^{- 1}$

$6.89 \times 1 0^{43} k g m s^{- 1}$

$3 \times 1 0^{- 23} k g m s^{- 1}$

$3.33 \times 1 0^{- 22} k g m s^{- 1}$

$λ = \frac{h}{m v} = \frac{h}{p}$
$p = \frac{h}{λ} = \frac{6.6 \times 1 0 ^{- 34}}{2.2 \times 1 0 ^{- 11}} = 3 \times 1 0^{- 23}$

Q. If wavelength of photon is 2.2×10−11m and h=6.6×10−34Js, then momentum of photon

1.452×10−44kgms−1

6.89×1043kgms−1

3×10−23kgms−1

3.33×10−22kgms−1