Question

1. Find the frequency and energy of light with a wavelength of 320nm.

Answer 1

`{\boxed{\sf Frequency_((\\u))=(c)/(\lambda)}}`

So

`\\ \sf\longmapsto \\u=(3* 10^8)/(320* 10^(-9))`

`\\ \sf\longmapsto \\u=0.009375* 10^(17)`

`\\ \sf\longmapsto \\u=9.375* 10^(14)Hz`

Now

`\boxed{\sf E=h\\u}`

`\\ \sf\longmapsto E=6.626* 10^(-34)* 9.4* 10^(14)`

`\\ \sf\longmapsto E=6.23* 10^(-19)J`

`\\ \sf\longmapsto E=6.23eV`