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Question
Solve the numerical problem.
The speed of light is 3 × 108 m/s. Calculate the frequency of red light of a wavelength of 6.5 × 10−7 m.
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Solution
Given: c = 3 × 108 m/s, λ = 6.5 × 10–7 m
To find: Frequency (ν)
Formula: c = νλ
Calculation: From formula,
ν = `"c"/λ=(3xx10^8)/(6.5xx10^-7)` = 4.6 × 1014 Hz
The frequency of red light is 4.6 × 1014 Hz.
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