Wave Optics Questions and Answer >> 6. Two coherent sources of light can be obtained by. [MH CET 2001] Two different lamps Two different lamps of same power and having the same colour Two different lamps but of the same power None of the above Answer & Explanation Answer: None of the above Explanation: The coherent source cannot be obtained from two different light sources. View Answer Report Error Let us discuss 7. If a star is moving towards the earth, then the lines are shifted towards. [AIIMS 1997] Red Blue Infrared Green Answer & Explanation Answer: Blue Explanation: When the source and observer approach each other, apparent frequency increases and hence wavelength decreases. View Answer Report Error Let us discuss 8. Wave nature of light is verified by. [RPET 2001] Interference Reflection Photoelectric effect Refraction Answer & Explanation Answer: Interference Explanation: Photoelectric effect varifies particle nature of light. Reflection and refraction varifies both particle nature and wave nature of light. View Answer Report Error Let us discuss 9. The fringe width in Young’s double slit experiment increases when. [MP PMT 2000] Wavelength increases Distance between the source and screen decreases Distance between the slits increases The width of the slits increases Answer & Explanation Answer: Wavelength increases Explanation: β = λD / d ⇒ β ∝ λ View Answer Report Error Let us discuss 10. If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of. [AFMC 1995] Dopplers effect Diffraction Interference None of these Answer & Explanation Answer: Dopplers effect Explanation: According to Doppler’s effect, wherever there is a relative motion between source and observer, the frequency observed is different from that given out by source.
Posted on: Mon, 21 Jul 2014 16:30:40 +0000
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