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Red light is generally used to observe d...

Red light is generally used to observe diffraction pattern from single slit. If blue light is used instead of red light, then diffraction pattern.

A

Will be more clear

B

Will contract

C

Will expand

D

Will not be visualized

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The correct Answer is:
B
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AAKASH INSTITUTE-WAVE OPTICS-Assignment (Section-A (objective type question(one option is correct)))
  1. The bending of light about corners of an obstacle is called

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  2. Angular width (beta) of central maximum of a diffraction pattern on a ...

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  3. Red light is generally used to observe diffraction pattern from single...

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  4. When a compact disc is illuminated by a source of white light, coloure...

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  5. For what distance is ray optics a good approximation when the aperture...

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  6. To observe diffraction, the size of the obstacle

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  7. In a single slit diffraction pattern

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  8. Diffraction and interference of light refers to -

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  9. The limit of resolution of an optical instrument arises on account of

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  10. A polariser in used to

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  11. Light waves can be polarised as they are

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  12. Through which character we can distiguish the light waves from sound w...

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  13. The angle of polarisation for any medium is 60^(@) , what will be crit...

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  14. Which of the following cannot be polarised?

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  15. Unpolarised light of intensity I is passed through a polaroid. What is...

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  16. Refractive index of material is equal to tangent of polarising angle. ...

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  17. Two polrizers are oriented with transmission planes making an angle of...

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  18. In case of linearly polarised light, the magnitude of the electric fie...

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  19. When the angle of incidence on a material is 60^(@), the reflected lig...

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  20. For the sustained interference of light, the necessary condition is th...

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