Question # 1

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

Choose an answer

4.1 cm

8.2 cm

9.9 cm

20 cm

Mathematical relationship between critical angle "C" and refractive index "n" is:

Choose an answer

N = C

N = 1 / sin c

N = 1 / cos c

N = 1 / sin2 c

The ratio of image height to object height is called:

Choose an answer

Linear magnification

Power

Refraction

Radius of curative

The point through which rays of light pass after reflection from concave mirror is called principal:

Choose an answer

Focus

Circle

Axis

Radius

The distance of image from mirror is represented by:

Choose an answer

q

p

F

m

If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will.

Choose an answer

refract only

reflect only

partially refract and partially reflect

Diffract only

In a convex mirror the size of the image:

Choose an answer

Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

A normal eye can see near objects clearly at a distance of:

Choose an answer

20 cm

25 cm

30 cm

35 cm

A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

Choose an answer

5.0 cm

7.5 cm

15 cm

20 cm

A device which has two ways communication is:

Choose an answer

Television

Radio

Hard disk

Mobile phone

Spherical mirrors are used in:

Choose an answer

Medical

Search light

Microscope

All of these

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

Choose an answer

Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

The refractive index of internal coating of optical fibre is:

Choose an answer

1.56

1.51

1.53

1.58

More Classes

Other Links

10th Class Physics Chapter 12 Geometrical Optics English Medium KPK Boards Online Mcqs 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