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A: When white light passes through lens ...

A: When white light passes through lens then refraction of violet light is more than that of red light.
R: For given lens, focal length of red light is more than that of violet light.

A

Both assertion and reason are true and the reason is correct explanation of the assertion.

B

Both assertion and reason are true but reason is not correct explanation of the assertion

C

Assertion is true but the reason is false.

D

Both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Both assertion and reason are true and the reason is correct explanation of the assertion.
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KUMAR PRAKASHAN-RAY OPTICS AND OPTICAL INSTRUMENTS-SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)
  1. A: Power of lens of goggles is zero. R: Radii of curvature of both...

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  2. A: If objective and eye-piece of compoun microcscope are interchanged,...

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  3. A: When white light passes through lens then refraction of violet ligh...

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  4. A: Magnified image is obtained by microscope. R: Angular dispersio...

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  5. A: Magnification for convex mirror is always positive where it may be ...

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  6. A spherical mirror gives real image 3 times greater than object. If di...

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  7. Focal length of plane mirror is ......

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  8. A light of ray incidents normally on one side of equilateral prism. If...

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  9. Two thin lenses of focal lengths f1 and f2, are in contact and coaxial...

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  10. The colour of rays is the property of ......

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  11. A critical angle for a medium is 60^@. Then the refractive index of th...

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  12. A wavelength of a monochromatic light in vacuum is lambda . It travels...

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  13. An object is placed at a distance 40 cm in front of concave mirror. Fo...

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  14. A real object is placed at a distance f from the pole of a convex mirr...

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  15. For a prism of refractive index 1.732, the angle of minimum deviation ...

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  16. A convex lens is immersed in a liquid, whose refractive index is equal...

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  17. The magnifying power of a telescope is m. If the focal length of the e...

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  18. A plane mirror produces a magnification of ….....

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  19. A transparent plastic bag filled with air form a concave lens. Now, if...

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  20. A microscope is focussed on an ink mark on th top of a table. If we pl...

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