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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

60 cm

C

125 cm

D

50 cm

Text Solution

Verified by Experts

The correct Answer is:
A
In case of concave mirror, `m=-2`
Also, `" " m=(f)/(f-u)`
`rArr " " -2=(-50)/(-50-u)`
`therefore` Distance of the object from the mirrot `u=-75 cm`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-RAY OPTICS-EXERCISE 1 (TOPICAL PROBLEMS)
  1. An object is placed at a distance of 30 cm from a concave mirror and i...

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  2. A convex mirror of focal length f produced an image (1//n)^(th) of the...

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

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  4. An object of size 7.5 cm is placed in front of a convex mirror of radi...

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  5. The image formed by a convex mirror of focal length 30 cm. is a quarte...

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  6. A concave mirror gives an image three times as large as the object pla...

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  7. A point object is placed at a distance of 10 cm and its real image is ...

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  8. Object is placed 15 cm from a concave mirror of focal length 10 cm, th...

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  9. Where should a person stand straight from the pole of a convex mirror ...

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  10. Find the position of image from given diagram.

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  11. A plano convex lens is made of glass of refractive index 1.5. The radi...

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  12. At what distance from a convex lens of focal length 30cm an object sh...

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  13. A plano - convex lens is made of flint glass. Its focal length is

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  14. Distance of an object from a concave lens of focal length 20 cm is 40 ...

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  15. Where should an object be placed from a converging lens of focal lengt...

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  16. An object is placed at 10 cm from a lens and real image is formed with...

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  17. The real image which is exactly equal to the size of an object is to b...

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  18. A plano-convex lens of curvature of 30 cm and refractive index 1.5 pro...

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  19. The minimum distance between an object and its real image formed by a ...

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  20. A convex lens of refractive index 3/2 has a power of 2.5^(@). If it is...

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