Question

if the wavelength of an electromagnetic radiation is 2000°A.what is the energy in ergs

Answer 1

hope it helps you dude.......!!!!

Answer 2

Given:

λ = 2000 A° = 2000×$10^{-8}$

To find:

Energy in ergs = ?

Formula to be used:

E = $\frac{hc}{\lambda}$

Where:

h = Constant with value 6.626 ×$10^{-34}$ J.s

c = speed of light = 3 × $10^{8} ms^{-1}$

λ = wavelength of radiation

Calculation:

E = $\frac{hc}{\lambda}$

E = $\frac{(6.626\times10^{-34}) (3\times10^8)}{2000\times10^{-8}}$

E = $\frac{1.98645\times 10^{-16}}{2000\times10^{-8}}$

E = 9.94×$10^{-12}$erg

Conclusion:

The energy of radiation with wavelength 2000A° is  9.94×$10^{-12}$erg.

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