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A convex glass lens (mu(g) = 1.5) has a ...

A convex glass lens `(mu_(g) = 1.5)` has a focal length of 8 cm when placed in air. What is the focal length of the lens when it is immersed in water ?
`(mu_(omega) = (4)/(3))`

A

32 cm

B

6 cm

C

16 cm

D

30 cm

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. Astigmatism can be corrected by using

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