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The energy of a photo having a wavelength of 10-10

The energy of a photo having a wavelength of 10-10m is
(h= 6.63 x 10 -34Js, c =3.0 x 10 8ms-1)

A.

2.0 x 10 -15J

B.

1.7 x 10 -13J

C.

2.0 x 10 -12J

D.

1.7 x 10 -12J

View answer & explanation

Correct answer is A

E = \(\frac{hc}{\lambda}\)

E = \(\frac{6.63 \times 10^{-34} \times 3 \times 10^18}{10^{-10}}\)

E = 2 x 10-15J

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