JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The energy of a photon is

3 \times {10^{ - 12}}

ergs. What is its wavelength in nm?

\left( {h = 6.62 \times {{10}^{ - 27}}\mathrm{ergs},\;c = 3 \times {{10}^{10}}\mathrm{cm}/\mathrm{s}} \right)

View answer and explanation

Correct option: A

662

The correct answer is A (662) because the wavelength is calculated using the energy of the photon and the Planck-Einstein relation, resulting in 662 nm.

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