Energy of a photon of light with wavelength 4.00 × 103 nm is y × 10-20 Joules. The value of y is. [Given: h =6.626 × 10-34 J s , c =3 × 108 ms -1 ]

Question

Energy of a photon of light with wavelength 4.00 × 103 nm is y × 10-20 Joules. The value of y is. [Given: h =6.626 × 10-34 J s , c =3 × 108 ms -1 ] (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

E =( hc /λ)=(6.626 × 10-34 J s × 3 × 108 m s -1/4.00 × 103 × 10-9 m ) =4.97 × 10-20 J ∴ Value of y =4.97

Q. Energy of a photon of light with wavelength $4.00 \times 1 0^{3} nm$ is $y \times 1 0^{- 20}$ Joules. The value of $y$ is______.
[Given: $h = 6.626 \times 1 0^{- 34} J s, c = 3 \times 1 0^{8} m s^{- 1}$ ]

$E = \frac{h c}{λ} = \frac{6.626 \times 1 0 ^{- 34} J s \times 3 \times 1 0 ^{8} m s ^{- 1}}{4.00 \times 1 0 ^{3} \times 1 0 ^{- 9} m}$
$= 4.97 \times 1 0^{- 20} J$
$∴$ Value of $y = 4.97$

Q. Energy of a photon of light with wavelength 4.00×103nm is y×10−20 Joules. The value of y is______. [Given: h=6.626×10−34Js,c=3×108ms−1 ]

E=λhc​=4.00×103×10−9m6.626×10−34Js×3×108ms−1​ =4.97×10−20J ∴ Value of y=4.97

Q. Energy of a photon of light with wavelength $4.00 \times 1 0^{3} nm$ is $y \times 1 0^{- 20}$ Joules. The value of $y$ is______.
[Given: $h = 6.626 \times 1 0^{- 34} J s, c = 3 \times 1 0^{8} m s^{- 1}$ ]

$E = \frac{h c}{λ} = \frac{6.626 \times 1 0 ^{- 34} J s \times 3 \times 1 0 ^{8} m s ^{- 1}}{4.00 \times 1 0 ^{3} \times 1 0 ^{- 9} m}$
$= 4.97 \times 1 0^{- 20} J$
$∴$ Value of $y = 4.97$