Post-UTME Physics 2019 Objective — Question 8
Question 8 of 20 from the Post-UTME Screening (Post-UTME) Physics 2019 Objective paper, with the correct answer and a full explanation.
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If the wavelength of a given light radiation is 6.0 x 10-7cm and the velocity is 3.0 x 10^8 ms-1, calculate the frequency.
- A. 1.80 x 10^8Hz
- B. 5.0 x 10^14Hz
- C. 9.0 x 10^15Hz
- D. 5.0 x 10^16HzCorrect
Explanation
Converting wavelength to metres (6x10^-9m) and using f=v/lambda = 3x10^8/6x10^-9 = 5x10^16 Hz.
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