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A convergent beam is incident on two sla...

A convergent beam is incident on two slabs placed in contact as shownin figure. Where will the rays finally converge?

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A converging beam of light rays incident on a glasa-air interface as shown in figure. Find where these rays will meet after refraction.

A converging beam of light is incident on a right angled isosceles prism as shown in the Figure. The marginal rays in the beam are incident at angle +- theta . The refractive index for the glass of the prism is mu = 1.49 (= (1)/(sin 42°)) . Find the maximum value of theta for which no light comes out of the hypotenuse surface.

Knowledge Check

  • A convergent beam is incident on a convex mirror. Reflected light

    A
    may form a real image
    B
    may form a virtual image
    C
    must form a real image
    D
    must form a virtual image

  • Find the focal length of a convex mirror foron which convergent beam of light is incident and converge to a distance 12 cm from the pole of the mirror. An inverted image of the same size is formed coincident with the virtual object.

    A
    24 cm
    B
    12 cm
    C
    6 cm
    D
    3 cm

  • Consider a light beam incident from air to a glass slab at Brewster's angle as shown in figure. A polaroid is placed in the path of the emergent ray at point P and rotated about an axis passing through the centre and pependicular to the plane of the plaroid.

    A
    for a particular orientation, there shall be darkness as observed through the polaroid
    B
    The intensity of light as seen through the polaroid shall be independent of the rotation
    C
    The intensity of light as seen through the polaroid shall go through a minimum but not zero for two orientations of the polaroid
    D
    The intensity of light as seen through the polaroid shall go through a minimum for four orientations of the polaroid

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    Two identical thin isosceles prisms of refracting angle A and refractive index mu are placed with their bases touching each other and this system can collectively act as a crude converging lens. A parallel beam of light is incident on this system as shown in Figure. Find the focal length of this so called converging lens.

    A converging set of ray, traveling from water to air, is incident on a plane interface. In the absence of the interface, the rays would have converged to a point O, 60 cm above the interface. However, dur to refraction the rays will bend. At what distance above the interface will the rays actually converge?

    A converging beam of rays in incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed, the point where the rays meet, move 5 cm closer to the mounting that holds the lens. Find the focal length of the lens.

    Figure shows a glass sphere of radius 10 cm. along its diameter AB from one side a parallel beam of paraxial rays incident on it. What should be the refractive index of glass so that after refraction all rays will converge at opposite end B.

    Consider a light beam incident from air to a glass slab at Brewster's angle as shown in Figure. A polaroid is placed in the path of the emergent ray at point P and rotated an axis passing through the centre and perpendicular to the plane of the polaroid.

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