Question

Calculate the energy of light having a wavelength of 395 nm.
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Answer 1

Answer:
`5.032* 10^(-19)\ J`

Step-by-step explanation:

Given

The wavelength of the light is
`\lambda =395\ nm`

Energy associated with a photon(light) is given by
`E=(hc)/(\lambda)`

where,
`h=\text{Planck constant}`

`c=\text{speed of light}`

`\Rightarrow E=(6.626* 10^(-34)* 3* 10^8)/(395* 10^(-9))\\\\\Rightarrow E=5.032* 10^(-19)\ J`

Therefore, the energy associated with the light is
`5.032* 10^(-19)\ J`