Question

Some physics viva questions I :Optics:


Definerefractiveindex.

WHat is the least value of refractive index possible?

What can you infer if someone says that he has a medium of refractive index less than one?

Define focus.

Define pole of a sphericalmirror.

Define optic centre.

What is spherical abberration?

WHat is chromatic abberration?

What is the focal length of a planemirror?

How will you distinguish between a planemirror, concavemirrorand a convexmirrorwithout feeling its surface with your hand?

Under what conditions can a planemirrorfor a real image?

What are thedifferencesbetween convex lens and concave lens?

What is dispersion?

Why a glass slab does not produce dispersion whereas a prism does?

Define refractive angle of the prism.

What is parallax?

What is indexcorrection?

How is parallax removed?

What are the practical uses of a concavemirror?

Why a concavemirroris considered better as a makeupmirror?

Why the reflectors used insearch lightsare paraboloidal and not concave?

Distinguishreal imageand virtual image.

Why mirrors are silvered on the back surface?

Why a convesxmirroris preferred as the rear viewmirrorof vehicles?

What is the principle on which the working of asimple microscopeis based?

Define power of a lens.

Define angle of deviation

What are the factors on which the lateral displacement produced by a glass slab depend?

Definecritical anglefor a pair of media

What is total internal reflection?

What are the applications of total interna reflection?

What is angle of minimum deviation?

What are the factors on which the deviation produced by a prism depends

What is the cause of dispersion?

Why atravellingmicroscopeis called so?

Answer 1

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