Physics-
General
Easy
Question
A ray of light is incident on an equilateral glass prism placed on a horizontal table For minimum deviation which of the following is true?
- PQ is horizontal
- QR is horizontal
- RS is horizontal
- Either PQ or RS is horizontal
The correct answer is: QR is horizontal
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Two identical thin isosceles prisms of refracting angle ‘A’ and refractive index m are placed with their bases touching each other Two parallel rays of light are incident on this system as shown The distance of the point where the rays converge from the prism is
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A ray of light strikes a plane mirror at an angle of incidence 450 as shown in the figure After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 40 The angle through which the mirror should be rotated if the total deviation of the ray is to be 900 is
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In 
sin 
In sin
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An isosceles prism of angle 1200 has a refractive index of 
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A container is filled with water (m = 1.3(C) upto a height of 33.25 cm A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water level The focal length of the mirror is
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White light is incident on the interface of glass and air as shown in the figure If green light is just totally internally reflected then the emerging ray in air contains
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A ray of light is incident at the glass-water interface at an angle i it emerges finally parallel to the surface of water, then the value of mg would be
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if 
is the Orthocentre of 
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