Optics Question 236

Question: A star producing light of wavelength 6000AA moves away from the earth with a speed of 5 km/sec. Due to Doppler effect the shift in wavelength will be (c=3×108m/sec)

[MP PMT 1990]

Options:

A) 0.1AA

B) 0.05AA

C) 0.2AA

D) 1AA

Show Answer

Answer:

Correct Answer: A

Solution:

Doppler’s shift is given by Δλ=vλc=5000×60003×108=0.1AA

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