Q43. The periodic time of rotation of a certain star is 22 days and its radius is 7 × 108 metres. If the wavelength of light emitted by its surface is 4320 Å, the Doppler shift will be: (1 day = 86400 sec) Physics — Optics, Nature of Light and Optical Instruments — Question 43 of 155A. 0.033 Å B. 0.33 Å C. 3.3 Å D. 33 Å Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →