Please select a subject first
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Name the kind of mirror used to obtain
(a) a real and enlarged image
(b) a virtual and enlarged image
(c) a real and diminished image, and
(d) a virtual and diminished image.
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How is M.C.B. superior to the fuse wire?
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A straight stick partly dipped in water obliquely appears to be bent at the surface of the water.
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The sun is seen before the sunrise and after the sunset.
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A switch should not be touched with wet hands.
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A source of potential difference V volt sends current I ampere in a circuit for time t second. Write expressions for
- electrical energy supplied by the source and
- electrical power spent by the source.
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Write the full form of M.C.B?
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Rays of light incident parallel to the principal axis pass through the focus after reflection from a concave mirror.
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A concave mirror converges the light-rays, but a convex mirror diverges them.
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A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
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The angle of incidence for a ray of light passing through the centre of curvature of a spherical mirror is ...........
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A concave mirror forms a virtual image for an object placed ...............................
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The angle between the normal and refracted ray is called
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Describe an experiment to show that a light ray bends when it passes from one transparent medium into another transparent medium.
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Draw a ray diagram to show that the depth of a vessel containing water when seen from above, appears to be less than its real depth.
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Define the following terms :
Incident ray, Refracted ray, Angle of incidence, Angle of refraction.
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A ray of light falls normally on a glass slab. What is the angle of incidence?
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A ray of light travels from a rarer medium to a denser medium. How will it bend?
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The diagram in figure shows a ray of light AO falling on a rectangular glass slab PQRS. Complete the diagram till the ray of light emerges out of the slab. Label on the diagram the incident ray, the refracted ray and the emergent ray.
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What is mirage? Give a reason for its formation?
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