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The image formed by a convex mirror of f...

The image formed by a convex mirror of focal length `30 cm`. is a quarter of the object. What is the distance of the object from the mirror ?

A

30 cm

B

90 cm

C

120 cm

D

60 cm

Text Solution

Verified by Experts

The correct Answer is:
B
Magnification, `m=(f)/(f-u)`
`rArr " " (+(1)/(4))=(+30)/(+30-u)`
`rArr` The distance of the object of the object from the mirror, `u=-90 cm`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-RAY OPTICS-EXERCISE 1 (TOPICAL PROBLEMS)
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  2. An object of size 7.5 cm is placed in front of a convex mirror of radi...

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

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

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

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

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  8. Find the position of image from given diagram.

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

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

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

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

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

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  19. Two thin lenses of focal lengths f(1) and f(2) are in contact. The fo...

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