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The radii of curvatures of a convex lens...

The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its refractive index is 1.5. Its focal length is

A

0.04 m

B

0.4 m

C

4 m

D

40 m

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
  1. A parallel beam of monochromatic light falls on a combination of a con...

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  2. Three lenses in contact have a combined focal length of 12 cm. When th...

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  3. The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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