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CBSE Notes 2011-2012 » XII-Physics

Ray Optics and Optical Instruments

When light undergoes refraction at the surface of separation of two media, what happens to its wavel...

Short answer question

When light undergoes refraction at the surface
of separation of two media, what happens to
its wavelength ? [AI 2000C]

The image of an object formed by a lens on the screen is not in sharp focus. Suggest a method to get...

Short answer question

The image of an object formed by a lens on the
screen is not in sharp focus. Suggest a method
to get clear focussing of the image on the screen
without disturbing the position of the object,
the lens or the screen. [Delhi 1998]

How does the frequency of a beam of ultraviolet light change when it goes from air into glass ? [Del...

Short answer question

How does the frequency of a beam of ultraviolet
light change when it goes from air into glass ?
[Delhi 2001]

What is the focal length of a plane mirror ? [Delhi 2001C]

Short answer question

What is the focal length of a plane mirror ?
[Delhi 2001C]

When light undergoes refraction, what happens to its frequency ? [AI 2000C]

Short answer question

When light undergoes refraction, what happens
to its frequency ? [AI 2000C]

Name the principle on which an optical fibre works.

Short answer question

Name the principle on which an optical fibre
works.

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