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Which mirror is used as a shaving mirror...

Which mirror is used as a shaving mirror and why ?

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Concave mirror, because it forms a magnified and erect image when held close to the face.
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MODERN PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Revision Exercises (Very Short Answer Questions)
  1. What is the focal length of a plane mirror ?

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

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

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

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  5. Why danger signals are red ?

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

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

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

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

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

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

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

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

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

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  15. A glass lens of refractive index 1.5 is placed in a trough of liquid. ...

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  16. Your are given following three lense. Which two lenses will you use as...

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  17. Does the critical angle depend on the wavelength of the light ?

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  18. Due to which phenomenon, advanced sunrise and delayed sunset occur ?

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  19. What will be the effect on the power of a glass lens if it is immersed...

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  20. Define one dioptre.

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