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TOTAL INTERNAL REFLECTION

A

Light travels from rarer medium to denser medium

B

Light travels from denser medium to rarer medium

C

Angle of incidence less than critical angle

D

Both (2) & (3)

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The correct Answer is:
B
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In the given figure, the faces of prism ABCD made of glass with a refractive index n form dihedral angles /_A=90^(@),/_B75^(@),,/_C=135^(@) & /_D=60^(@) (The Abbe's prism) .A beam of light falls on face AB & after total internal reflection from face BC escapes through face AD .Find the range of n and angle of incidence alpha of the beam onto face AB , if a beam that has passed through the prism in this mahner is perpedicular to the incident beam.

The path of a ray of light passing through an equilateral glass prism ABC is shown in figure. The ray of light is incident on face BC at the critical angle for just total internal reflection. The total internal reflection. The total angle of deviation after the refraction at face AC is 108^@ . Calculate the refractive index of the glass.

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Material A has critical angle i_(A) , and material B has critical angle i_(B)(i_(B)gti_(A)) . Then which of the following is true (i) Light can be totally internally reflected when it passes from B to A (ii) Light can be totally internally relected when it passes from A to B (iii) Critical angle for total internal reflection is i_(B)-i_(A) (iv) Critical angle between A and B is sin^(-1)((sini_(A))/(sin i_(B)))

A ray of light falls normally on one face of a right angled prims of refracting angle A. It suffers two total internal reflections before coming out of prism parallel to incident ray as shown. Refractive index to prism material will be:

A ray of light is incident on a glass prism of refractive index mu and refractive angle A. If it just suffers total internal reflection at the other face, obtain an expression relating the angle of incidence , angle of prism and critical angle.

The figure shows the path of a ray passing through an equiangular prism PQR. It is incident on face PR at angle slightly greater than the critical angle for total internal reflection . If the angle alpha shown in the figure is 30^(@) . Calculate the R.I. of the material of the prism.

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AAKASH INSTITUTE ENGLISH-Mock Test 34: PHYSICS-Example
  1. Image of an object in a convex mirror is

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  2. The minimum distance between the object and its real image for concave...

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  3. Draw E and V versus r on the same graph for a point charge.

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  4. Can we project the image formed by a plane mirror on to a screen? Give...

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  5. When the two plane mirror are parallel to each other, then the number ...

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  6. An object is placed at a distance f in the front of a convex mirror. ...

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  7. A short linear object of length b lies along the axis of a concave mir...

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  8. The value of refractive index of diamond

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  9. For total internal reflection to take place, the angle of incidence i ...

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  10. If c is velocity of light in vacuum and v is the velocity of light in ...

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  11. Which of the following statements is true?

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  12. A light enters a glass slab of thickness t with angle of incidence i s...

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  13. If a ray of light is incident from rarer medium at an angle 45° on the...

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  14. If the incident ray falls normally on the refracting surface then

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  15. A beaker is filled with two immiscible transparent liquids of refracti...

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  16. The brilliance of diamond is due to

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  17. If light travels a distance of 5 m in a medium of refractive index mu,...

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  18. One mole of a perfect gas expands adiabatically .As a result of this,i...

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  19. A ray of light falls on a transparent glass slab of refractive index s...

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  20. TOTAL INTERNAL REFLECTION

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