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The focal length of a concave mirror is ...

The focal length of a concave mirror is 50cm. Where an object be placed so that its image is two times and inverted

A

75 cm

B

72 cm

C

63 cm

D

50 cm

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The correct Answer is:
A
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MOTION-RAY OPTICS-Exercise-1
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  2. If an object is 30 cm away from a concave mirror of focal leng...

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  3. The focal length of a concave mirror is 50cm. Where an object be place...

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  4. The focal length of a concave mirror is 12 cm . Where should a...

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  5. An object of height 1.5 cm situated at a distance of 15 cm fro...

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  6. A point object is moving on the principal axis of a concave mirror of ...

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  7. A concave mirror gives an image three times as large as the obje...

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  8. A ray of light passes throught a plane glass slab of thickness t...

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  9. A ray of light travels from air to glass. It is found that the angle o...

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  10. If mu0 be the permeability and k0 , the dielectric constant of a mediu...

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  11. Monochromatic light of frequency 5xx10^(14) Hz travelling in vacuum en...

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  12. Light travel through a glass place of thickness t and refractive index...

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  13. The refractive index of water is (4//3) and that of glass is (3//2...

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  14. A ray of light travels through a transparent slab with a speed of 2 x...

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  16. Total internal reflection occurs in waves, when wave enters-

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  17. The total internal reflection of a beam of light occurs when beam of l...

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  19. The wavelength of light in two liquids ‘ x ' and ‘ y ' is 3500 Å and ...

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  20. The ratio of the refractive index of red light to blue light in air is

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