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A ray of light strikes a cubical slab su...

A ray of light strikes a cubical slab surrounded by air as shown in the figure. Then the geometrical path length traversed by the light in the slab will be:

A

`2sqrt(3)`m

B

2m

C

6m

D

`((sqrt(3))/(2) + (3)/(2))`m

Text Solution

Verified by Experts

The correct Answer is:
C
Critical angle `(3)/(2)` sin c =1 , sin c = `(2)/(3)`
Geometrical path length travelled by the light in the slab will be = `2+1+2 +1 = 6`m
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ALLEN -GEOMETRICAL OPTICS-EXERCISE-2
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  2. A ray of light of refractive index 1.4approaches the boundary surface ...

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  3. A ray of light strikes a cubical slab surrounded by air as shown in th...

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  4. A cubical block of glass of refractive index n1 is in contact with the...

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  5. A beam of diameter 'd' is incident on a glass hemisphere. If the radiu...

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  6. When the object is at distance u(1)andu(2)the images formed by the sa...

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  7. A light ray hits the pole of a thin biconvex lens as shown in fig. The...

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  8. A ray of light passes through a prism in a principle plane the deviati...

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  9. The diagram shows five isosceles right angled prisms.A light ray incid...

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  10. A certain prism is found to produce a minimum of38^(@).It produces a d...

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  11. A ray incident at an angle 53^(@) on a prism emerges at an angle 37^(@...

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  12. A man of height 170cmwants to see his complete image in a plane mirror...

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  13. Two plane mirrors at an angle such that a ray incident on a mirror und...

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  14. If the equation of mirror is given by y= 2//pi "sin"pix (y gt 0 , 0 le...

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  15. In the fig. shown consider the first reflection at the plane mirror an...

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  16. The figure shows a ray incident a angle i=pi//3 of the plot drawn show...

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  17. A ray of light is incident normally on one face of 30^(@) - 60^(@) - 9...

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  18. A curved surface of radius R separates two medium of refractive indice...

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  19. A curved surface of radius R separates two medium of refractive indice...

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  20. A curved surface of radius R separates two medium of refractive indice...

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