b ) Which colour of white light gets deviated. (I) most. (Ii) least by a
glass prism?
(c ) State the basic cause of refraction of light.
(d ) A part of a pencil, under water, appears bent with respect to its
part above water. Give reason for this observation.
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Answer: i hope the answer for B one is the bending of red component of white light is least while most for the violet component.
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b).Since the wavelength of violet light is the smallest, therefore maximum deviationwill occur for violet light.
c).Light refracts whenever it travels at an angle into a substance with a differentrefractive index (optical density). This change of direction is caused by a change in speed. When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is calledrefraction.
d).A stick or a pencil half immersed in water at anangle appears bent due to refraction of light at theair-water surface. ... As a result immersed portion of the stickappears to be bent when viewed at anangle from outside.
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