The mass of a photon with a wavelength equal to 1.54× 10-8cm is:

Question

The mass of a photon with a wavelength equal to 1.54× 10-8cm is: (A)  0.8268× 10-34kg  (B)  1.2876× 10-33kg (C)  1.4285× 10-32kg (D)  1.8884× 10-32kg

Tardigrade Admin · Accepted Answer

We know that λ=(h/m v) ∴ m=(h/λ v) The velocity of photon (v)=3 × 108 m sec -1 λ=1.54 × 10-8 cm =1.54 × 10-10 metre ∴ m=(6.626 × 10-34 Js /1.54 × 10-10 m × 3 × 108 m sec -1) =1.4285 × 10-32 kg

Q. The mass of a photon with a wavelength equal to $1.54 \times 1 0^{- 8} c m$ is:

$0.8268 \times 1 0^{- 34} k g$

$1.2876 \times 1 0^{- 33} k g$

$1.4285 \times 1 0^{- 32} k g$

$1.8884 \times 1 0^{- 32} k g$

Q. The mass of a photon with a wavelength equal to 1.54×10−8cm is:

0.8268×10−34kg

1.2876×10−33kg

1.4285×10−32kg

1.8884×10−32kg

We know that λ=mvh​ ∴m=λvh​ The velocity of photon (v)=3×108msec−1 λ=1.54×10−8cm =1.54×10−10metre ∴m=1.54×10−10m×3×108msec−16.626×10−34Js​ =1.4285×10−32kg

Q. The mass of a photon with a wavelength equal to $1.54 \times 1 0^{- 8} c m$ is:

$0.8268 \times 1 0^{- 34} k g$

$1.2876 \times 1 0^{- 33} k g$

$1.4285 \times 1 0^{- 32} k g$

$1.8884 \times 1 0^{- 32} k g$