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A convex mirror forms an image one-fourt...

A convex mirror forms an image one-fourth the size of the object. If object is at a distance of 0.5 m from the mirror the focal length of the mirror is

A

0.16 m

B

`-1.5m`

C

0.4 m

D

`-0.4m`

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
  1. The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...

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  2. A convex glass lens (mu(g) = 1.5) has a focal length of 8 cm when plac...

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  3. A convex mirror forms an image one-fourth the size of the object. If o...

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  4. A travelling microscope is focussed on to a scratch on the bottom of a...

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  5. While a moving picture is being screened, a boy introduced a glass sla...

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  6. For a plano convex lens, the radius of curvature of convex surface is ...

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  7. A lens made of material of Refractive index mu(2) is surrounded by a m...

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  8. A light ray is incident normally on one of the refracting faces of a p...

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  9. If a light ray incidents normally on one of the faces of the prism of ...

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  10. A ray of light is incident on one of the faces of the angle prism with...

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  11. A prism of refractive index sqrt2 has refractive angle 60^@. In the or...

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  12. The least angle of deviation for a glass prism is equal to its refract...

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  13. A light ray of angles of incidence 40^(@) emerged from the prism in mi...

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  14. The angle of minimum deviation for a 75^(@) prism of dense glass is fo...

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  15. Suppose a small angled prism of 6^(@) deviates a ray through 3^(@), th...

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  16. For a given prism thetaanddelta are angular dispersion and deviation. ...

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  17. If a is the size of scatterer and lamda is the wavelength of light the...

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  18. Which of the following colour is scattered most is atmosphere?

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  19. Astigmatism can be corrected by using

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  20. Lateral magnification of objective of compound microscope is 100 and a...

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