Recent questions tagged ray optics and optical instruments

+3 votes

1 answer

Consider the following statement: The principle of total internal reflection is applicable to explain the

asked Apr 7, 2019 in Class 12 by kratos

+1 vote

1 answer

How is the working of a telescope different from that of a microscope ?

asked Apr 6, 2019 in Class 12 by kratos

+1 vote

1 answer

The rays of different colours fail to converge at a point after going through a converging lens. This defect is called

asked Apr 6, 2019 in Class 10 by kratos

+3 votes

1 answer

An astronomical telescope has a large aperture to (a) reduce spherical aberration.

asked Apr 6, 2019 in JEE by kratos

+2 votes

1 answer

Two thin convex lens of power + 5 and +4 diopter are placed co-axially at a distance 10 cm.

asked Apr 5, 2019 in JEE by kratos

+1 vote

1 answer

When an object is placed between f and 2f of a concave mirror, would the image formed be (i) real or virtual and

asked Apr 5, 2019 in Class 12 by kratos

+2 votes

1 answer

Sunlight reaches to us in composite form and not in its constituent colours because

asked Apr 5, 2019 in Class 12 by kratos

+1 vote

1 answer

Which of the following statements about laws of reflection is/are

asked Apr 4, 2019 in Class 12 by kratos

+1 vote

1 answer

A compound microscope consists of an objective of focal length 1 cm and eyepiece of focal length 5 cm separated by 12.2 cm.

asked Apr 4, 2019 in JEE by kratos

+1 vote

1 answer

Write down the Lens maker'* formula and what do you mean by spherical aberration of a lens.

asked Apr 1, 2019 in Class 12 by kratos

+3 votes

1 answer

It the focal length of objective lens is increased then magnifying power of :

asked Apr 1, 2019 in Class 12 by kratos

+3 votes

1 answer

For the same angle of incidence in media P, Q and R, the angles of refraction ate 45°,35° and 15° respectively.

asked Mar 31, 2019 in Class 12 by kratos

+1 vote

1 answer

(i) Draw a neat labelled ray diagram of an astronomical telescope in normal adjustment. Explain briefly its working.

asked Mar 31, 2019 in JEE by kratos

+1 vote

1 answer

The light gathering power of an astronomical telescope depends upon

asked Mar 31, 2019 in Class 12 by kratos

+2 votes

1 answer

Assume that R1 = R2, n1 ≠ n3. The ratio, f1/f2, of the two focal lengths is equal to

asked Mar 30, 2019 in JEE by kratos

+1 vote

1 answer

(i) Draw a neat labelled ray diagram of a compound microscope. Explain briefly its working.

asked Mar 30, 2019 in JEE by kratos

+1 vote

1 answer

Two thin conves lenses of focal length 15 cm and 30 cm are placed in contact. What

asked Mar 30, 2019 in JEE by kratos

+1 vote

1 answer

You are given the following three lenses. Which two lenses will you use as an eyepiece and as an objective

asked Mar 28, 2019 in JEE by kratos

+3 votes

1 answer

You are given three lenses L1, L2 and L3 each of focal length 20cm.

asked Mar 28, 2019 in Class 12 by kratos

+3 votes

1 answer

A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm.

asked Mar 28, 2019 in JEE by kratos

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