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A parallel monochromatic beam of light is incident normally on a narrow slit.A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam.At the first minimum of the diffraction pattern,the phase difference between the rays coming from the two edges of the slit is

A

0

B

`pi//2`

C

`pi`

D

`2 pi`

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. In the adjacent diagram, CP represents a wavefront and AO & BP, the co...

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  2. Yellow light is used in a single slit diffraction experiment with slit...

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  3. A parallel monochromatic beam of light is incident normally on a narro...

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  4. A beam of light of wavelength 600 nm from a distant source falls on a ...

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  5. A ray of light from a rarer medium strikes a denser medium. The reflec...

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  6. A light ray travelling in glass medium is incident on glass-air interf...

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  7. A ray of light is reflected at angle 30^@.If the angle of incidence be...

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  8. A ray of light travels from the point A to B with a uniform speed.On i...

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  9. A boy is running towards a plane mirror with a speed of 2 m s^(-1).Wit...

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  10. A square wire of side 3 cm is placed 25 cm away from a concave mirror ...

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  11. If a concave mirror of focal length f produces a real image n times th...

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  12. A concave mirror of focal length f ( in air ) is immersed in water (mu...

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  13. A convex mirror of focal elongth f produces an image magnified m times...

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  14. A convex mirror forms an imge,which is 1//n times the size of the obje...

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  15. A short linear object of length b lies along the axis of a concave mir...

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  16. A diminihsed virtual image can be produced only with

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  17. A virtual image larger than the object can be produced by

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  18. The field of the view is maximum for

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  19. In case of spherical mirrors,which of the followed do/does not depend ...

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  20. Light appears to travel in a straight lines,since

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