Question # 1

In order to get interference using two light rays

Choose an answer

The sources should be monochromatic and coherent

The sources should have the same frequency

Superposition should be linear

All of these

In case of point, source of light shape of wavefront is:

Choose an answer

Spherical

Cylindrical

Plane

None of these

The terms phase difference and path difference are:

Choose an answer

Same

Different

Equal

None of these

The focal length of convex lens having magnifying power of 5.55 is:

Choose an answer

5.5 cm

5 cm

4.5 cm

6 cm

When a source of light isat very large distance,the shape of wavefront is:

Choose an answer

Spherical

Cylindrical

Plane

None of these

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Choose an answer

5 cm

10 cm

15 cm

20 cm

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

Choose an answer

5 cm

10 cm

20 cm

25 cm

The distance from eye to near point is taken as:

Choose an answer

10 cm

15 cm

20 cm

25 cm

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Choose an answer

Greater, smaller

Smaller, smaller

Smaller, larger

Greater, larger

The ratio of the size of the image to that of object is called:

Choose an answer

Focal length

Aperture

Linear magnification

Principal axis

If the object is situated at focus of a convex lens, then its image is formed at:

Choose an answer

F

2F

Infinity

None of these

When the object lies between F and 2F, the image formed by is formed at:

Choose an answer

Real

Virtual

Diminished

Erect

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Choose an answer

Greater than

Smaller than

Equal to

None of these

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Choose an answer

1

0.2

2

0.1

The contrast in the fringes in an interference pattern depends upon

Choose an answer

Fringe width

Relative difference intensities of the two sources

Distance between the slits

Wavelength

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Choose an answer

Double the size

Same size

Half the size

None of these

More Classes

Other Links

ECAT Physics Chapter 9 Physical Optics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer