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Plane microwaves are incident on a long slit having a width of 5.0 cm. Calculate the wavelength of the microwaves if the first diffraction minimum is formed at `theta=30^@`.

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The correct Answer is:
B, C
For first minimum diffraction `bsinphi=lamda`
Here `theta=30^@,b=5cm`
`=5/2=2.5cm`
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HC VERMA-LIGHT WAVES-Exercises
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  2. Consider the situation of the previous problem, if the mirror reflects...

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  3. A double slit S1-S2 is illuminated by a coherent light of wavelength l...

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  4. White coherent light (400 nm-700 nm) is sent through the slits of a YD...

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  5. Consider the arrangement shown in figure. The distance D is large comp...

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  6. Two coherent point sources S1 and S2 emit light of wavelength lambda. ...

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  7. figure shows three equidistant slits illuminated by a monochromatic pa...

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  8. In a Young's double slit experiment, the separation between the slits ...

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  9. In a Young's double slit interference experiment the fringe pattern is...

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  10. In a Young's double slit experiment lamda= 500nm, d=1.0 mm andD=1.0m. ...

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  11. The line-width of a bright fringe is sometimes defined as the separati...

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  12. Consider the situation shown in figure. The two slits S1 and S2 placed...

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  13. Consider the arrangement shownin figure. By some mechanism,the separat...

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  14. A soap film of thickness 0.0011 mm appears dark when seen by the refle...

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  15. A parallel beam of light of wavelength 560 nm falls on a thin film of ...

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  16. A parallel beam of white light is incident normally on a water film 1....

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  17. A glass surface is coated by an oil film of uniform thickness 1.00xx10...

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  18. Plane microwaves are incident on a long slit having a width of 5.0 cm....

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  19. Light of wavelength 560 nm goes through a pinhole of diameter 0.20 mm ...

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  20. A convex lens of diameter 8.0 cm is used to focus a parallel beam of l...

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