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Wednesday, 11 March 2026
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The energy of a photo having a wavelength of 10-10m is (h= 6.63 x 10 -34Js, c =3.0 x 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)
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  • A 2.0 x 10 -15J
  • B 1.7 x 10 -13J
  • C 2.0 x 10 -12J
  • D 1.7 x 10 -12J
Correct Answer: Option A
Explanation:
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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