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Covalent Bond

The ratio of ...

Question

The ratio of the energy of a photon of 2000 Å wavelength radiation to that of 4000 Å radiation is:

A

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B

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C

2

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D

4

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Solution

The correct option is C
2

From, ΔE = hc/λ

The ratio of energies of two radiations is given by,

E₁ = hc/2000, E₂ = hc/4000 ; E₁/E₂ = 2

Note: Energy is inversely proportional to wavelength.

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