Question

Calculate the energy of a light having a wavelength of 6.80 x 102 nm.
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Answer 1

Energy,
`E=2.92* 10^(-19)\ J`

Step-by-step explanation:

Given that,

The wavelength of a light is
`6.8* 10^2\ nm`

We need to find the energy of light. The formula for the energy of light is given by :

`E=(hc)/(\lambda)\\\\E=(6.63* 10^(-34)* 3* 10^8)/(6.8* 10^2* 10^(-9))\\\\E=2.92* 10^(-19)\ J`

So, the energy of a light is
`2.92* 10^(-19)\ J`.