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For what distance is ray optics a good a...

For what distance is ray optics a good approximation when the aperture is 3 mm wide and the wavelength is 500 nm?

A

6 m

B

18 mm

C

18m

D

6 mm

Text Solution

Verified by Experts

The correct Answer is:
C
For answer see Physics Darpan, Part-2, Section-B, Illustration of Textbook example no. 10.7
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KUMAR PRAKASHAN-WAVE OPTICS-SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)
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  8. In a Young’s double-slit experiment, the slits are separated by 0.28 m...

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  10. In a double-slit experiment the angular width of a fringe is found to ...

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  13. The 6563Å Halpha line emitted by hydrogen in a star is found to be red...

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  18. The angle of incidence at which reflected light totally polarised for ...

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