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Question

The wavelength of light that has a frequency of 1.20 × 1013s-1 is __________ m.


A

25.0

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B

2.50 × 10-5

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C

0.0400

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D

12.0

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Solution

The correct option is B

2.50 × 10-5


The speed of all form of electromagnetic wave is related by the equation c = λ.v, whereby, λ = 3.0 x 108 / 1.2 x 1013 = 2.5 x 10 -5 m.


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