Physics-
General
Easy
Question
A ray of light travels from a medium of refractive index m to air Its angle of incidence in the medium is i, measured from the normal to the boundary, and its angle of deviation is d d is plotted against i which of the following best represents the resulting curve
The correct answer is:
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if 
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if is the Orthocentre of
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A cubical block of glass of refractive index n1 is in contact with the surface of water of refractive index n2 A beam of light is incident on vertical face of the block (see figure) After refraction, a total internal reflection at the base and refraction at the opposite vertical face, the ray emerges out at an angle q The value of q is given by :
A cubical block of glass of refractive index n1 is in contact with the surface of water of refractive index n2 A beam of light is incident on vertical face of the block (see figure) After refraction, a total internal reflection at the base and refraction at the opposite vertical face, the ray emerges out at an angle q The value of q is given by :
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A diverging beam of light from a point source S having divergence angle a , falls symmetrically on a glass slab as shown the angles of incidence of the two extreme rays are equal If the thickness of the glass slab is t and the refractive index n, then the divergence angle of the emergent beam is
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A ray of light passes through four transparent media with refractive indices 
as shown in the figure, the surfaces of all media are parallel If the emergent ray CD is parallel to the incident ray AB, we must have
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A linear object is placed along the axis of a mirror as shown in fig If ‘f’ is the focal length of the mirror then the length of image is
A linear object is placed along the axis of a mirror as shown in fig If ‘f’ is the focal length of the mirror then the length of image is
physics-General
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Two plane mirrors A and B are aligned parallel to each other, as shown in the figure A light ray is incident at an angle 30° at a point just inside one end of A The plane of incidence coincides with the plane of the figure The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is
Two plane mirrors A and B are aligned parallel to each other, as shown in the figure A light ray is incident at an angle 30° at a point just inside one end of A The plane of incidence coincides with the plane of the figure The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is
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A point source of light B, placed at a distance L in front of the centre of a plane mirror of width d, hangs vertically on a wall A man walks in front of the mirror along a line parallel to the mirror at a distance 2 L from it as shown The greatest distance over which he can see the image of the light source in the mirror is
A point source of light B, placed at a distance L in front of the centre of a plane mirror of width d, hangs vertically on a wall A man walks in front of the mirror along a line parallel to the mirror at a distance 2 L from it as shown The greatest distance over which he can see the image of the light source in the mirror is
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Following figure shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another If the angle of incidence at point P is 30°, what are the angles of reflection of the light ray at points Q, R, S and T respectively
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The graph shows variation of v with change in u for a mirror Points plotted above the point P on the curve are for values of v
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A linear object is placed along the axis of a mirror as shown in figure If ‘f’ is the focal length of the mirror then the length of image is
A linear object is placed along the axis of a mirror as shown in figure If ‘f’ is the focal length of the mirror then the length of image is
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A plane mirror of length 8 cm is moving with speed 3 m/s towards a wall in situation as shown in figure.A source of light S gives narrow and parallel light on to the mirror, then the speed of light spot formed on the wall is.
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A projectile 
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A projectile is thrown at an angle of to the horizontal from point . At the same time, another projectile is thrown with velocity upwards from the point vertically below the highest point. For to collide with should be
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