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Q.

The radiation is emitted when a hydrogen atom goes from a higher energy state to a lower energy state. The wavelength of one line in visible region of atomic spectrum of hydrogen is 6.63×10−7 m. Energy difference between the two states is

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a

1.0×10−18J

b

5.0×10−10J

c

6.5×10−7J

d

3.0×10−19J

answer is A.

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Detailed Solution

ΔE=hcλ

=6.626×10−34×3×1086.63×107

=2.9×10−19J−3×10−19J

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The radiation is emitted when a hydrogen atom goes from a higher energy state to a lower energy state. The wavelength of one line in visible region of atomic spectrum of hydrogen is 6.63×10−7 m. Energy difference between the two states is