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Which type of mirror is preferred for ob...

Which type of mirror is preferred for observing traffic at the back ?

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Convex mirror, as it always forms virtual, erect and smaller image.
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MODERN PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Revision Exercises (Very Short Answer Questions)
  1. Why a parabolic mirror is preferred to an ordinary spherical mirror?

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  2. Which spherical mirror has a real focus ?

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  3. Which type of mirror is preferred for observing traffic at the back ?

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  4. What will be the change in focal length of a concave mirror when it is...

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  5. Two plane mirrors are inclined at an angle of theta^(@) What will be ...

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  6. What is the number of images of an object held between two parallel pl...

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  7. What is the focal length of a plane mirror ?

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  8. How will the focal length of a concave mirror change if the wavelength...

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  9. Which mirror is used as a shaving mirror and why ?

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  10. For which position of the object, magnification of convex lens is -1.(...

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  11. Why danger signals are red ?

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  12. Write the relation between critical angle and refractive index of a me...

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  13. A substance has critical angle of 45^(@) for yellow light. What is its...

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  14. If (sini)/(sinr)=n(21)gt1. Out of medium 1 and medium 2, which is mor...

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  15. A convex lens is placed in contact with a plane mirror. An axial point...

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  16. A biconcave lens made of a transparent material of refractive index 1...

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  17. The radii of curvature of both the surfaces of a convex lens are equal...

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  18. Two thin lenses of power +6 D and -2 D are in contact. What is the foc...

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  19. For the same value of angle of incidence, the angles of refraction in ...

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  20. When red light passing through a convex lens is replaced by light of b...

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