Question

How much energy does a 930 nm wave of light have? (The speed of light in a

vacuum is 3.00 x 108 m/s, and Planck's constant is 6.626 x 10-34 Jos.)
A. 1.85 x 10-31 J
B. 4.68 x 1018 j
C. 2.14 x 10-19 J
D. 4.21 x 1035 J

Answer 1

`E=2.14* 10^(-19)\ J`

Step-by-step explanation:

We have,

Wavelength of a light is 930 nm

It is required to find the energy of a wave of light. The energy of a wave is given in terms of following as :

`E=(hc)/(\lambda)\\\\E=(6.626* 10^(-34)* 3* 10^8)/(930* 10^(-9))\\\\E=2.14* 10^(-19)\ J`

So, the energy of the wave is
`2.14* 10^(-19)\ J`