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A large glass slab (mu=5//3) of thicknes...

A large glass slab `(mu=5//3)` of thickness 8cm is placed over a point source of light on a plane surface. It is seen that light emerges out of the top surface of the slab from a circular area of radius R cm. What is the value of R?

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The correct Answer is:
6
`tanC=(R)/(8) ……..(i)`
`(5)/(3) sinC=1.sin90^(@)`
`sinC=(3)/(5)`
`C=37^(@)`
`(3)/(4)=(R)/(8)`
`R=6 cm` .
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-3
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  2. Image of an object approaching a convex mirror of radius of curvature ...

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  3. A large glass slab (mu=5//3) of thickness 8cm is placed over a point s...

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  4. A light ray traveling in glass medium is incident on glass-air interfa...

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  5. Water (with refractive index =4//3) in a tank is 18cm deep. Oil of ref...

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  6. A bi-convex lens is formed with two thin plano-convex lenses as shown ...

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  7. Most material have the refractive index, n gt 1. So, when a light ray ...

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  8. Most material have the refractive index, n gt 1. So, when a light ray ...

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  9. The image of an object, formed by a plano-convex lens at a distance of...

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  10. A ray of light travelling in the direction (1)/(2)(hati,+sqrt3hatj) is...

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  11. A transparent with film of uniform thickness and refractive index n(1)...

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  12. A point source S is placed at the bottom of a transparent block of hei...

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  13. Consider a concave mirror and convex lens (refractive index = 1.5 ) of...

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  14. Two identical glass rods S(1) and S(2) (refractive index=1.5) have one...

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  15. A monochromatic beam of light is incided at 60^(@) in one face of an e...

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  16. Light guidance in an optical fibre can be understood by considering a ...

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  17. Light guidance in an optical fibre can be understood by considering a ...

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  18. The refractive index of a glass is 1.520 for red light and 1.525 for b...

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  19. A student measuring the focal length of convex lens by putting an obje...

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  20. A transparent solid cylindrical rod has a refractive index of (2)/(sqr...

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