Physics GK · all questions

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Q421

In long-sightedness, images are formed

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Q422

Optical fiber works on the principal of?

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Q423

Sea seems blue due to

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Q424

Which one among the following has the highest energy?

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Q425

An optical illusion which occurs mainly in deserts during hot summer is based on the principle of

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Q426

Light travels in a straight line (rectilinear propagation of light). This statement does hold, if the medium of travel for light

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Q427

In case of a concave mirror, if an object is kept between principal focus F and pole P of the mirror, then which one of the following statements about the image is not correct?

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Q428

Convex mirrors are used as a rear view mirror in motion cycles because

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Q429

The visible range of solar radiation is

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Q430

Which kind of mirrors is used as rear view wing mirrors in vehicles?

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Q431

A light beam that appears at the main focus of a concave lens will emit after refraction.

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Q432

The focal length of a spherical mirror is . . . . . . . .

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Q433

Two glass lenses of same focal length, one being convex and the other concave, are kept in contact, the combination will act as

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Q434

Which of the following does not used concave mirror?

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Q435

The theory belongs behind stars twinkling is that-

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Q436

Persons suffering from myopia are advised to use

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Q437

The characteristics of an image form by a plane mirror are:

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Q438

In which case a incident ray and reflected ray are all on the same surface?

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Q439

The center of the reflecting surface of a spherical mirror of a point called.

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Q440

Which one of the following energy conversions takes place in carrying out the process of photosynthesis?

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