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Calculate the energy in joule correspond...

Calculate the energy in joule corresponding to light of wavelength `45 nm` :
(Planck' constant `h = 6.63 xx 10^-34 Js` , speed of light `c = 3 xx 10^8 ms^-1`)

A

`4.42xx10^(-15)`

B

`4.42xx10^(-18)`

C

`6.67xx10^(15)`

D

`6.67xx10^(11)`

Text Solution

Verified by Experts

The correct Answer is:
B
`E="hc"/lambda=(6.63xx10^(-34) xx 3 xx 10^8)/(45xx10^(-9))`
`=4.42xx10^(-18) J`.
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