Science Physics MCQ-169

General Science-Physics Model Questions for DelhiPolice, RBI, UPPSC, NDA, SSC, UPSC, CDS, CivilsPrelims Exams



Consider the following two statements regarding a linearly polarized plane electromagnetic wave

(1) the electric field and the magnetic field have equal average values
(2) the electric energy and magnetic energy have equal average values

 
 
 
 

According to the modern theory for nature of light, the light has

 
 
 
 

Velocity of light is maximum in

 
 
 
 

In vacuum the speed of light depends upon :

 
 
 
 

If V c is the speed of light in vacuum and Vc is the speed of light in given medium then the refractive index of medium is

 
 
 
 

A ray of light travelling obliquely from denser to rarer medium

 
 
 
 

The laws of reflection are true for

 
 
 
 

The focal length of plane mirror is

 
 
 
 

A ray of light incident on a plane mirror at angle x0 . If the angle between the incident and reflected rays is 800, what is the value of x0?

 
 
 
 

If a ray of light incident on a plane mirror is such that it makes an angle of 300 with the mirror, then the angle of reflection is

 
 
 
 

A boy is standing in front of a plane mirror at a distance of 3 m from it. What is the distance between the boy and his image

 
 
 
 

The amount of light reflected depends upon

 
 
 
 

An observer moves towards a plane mirror with a speed of 2 m/s. The speed of the image with respect to the observer is

 
 
 
 

A plane mirror reflects a beam of light to form a real image. The incident beam is

 
 
 
 

A man of height 1 .4 m wishes to see his full image in a plane mirror placed at distance of 2 m. The minimum height of the mirror should be

 
 
 
 

A toy is placed between two plane mirror inclined at angle of 60 0 The number of images formed is

 
 
 
 

An object is placed between two parallel mirrors. The number of images formed is

 
 
 
 

Two plane mirrors are placed perpendicular to each other. A ray strikes one mirror and after reflection falls on the second mirror. The ray after reflection from the second mirror will be

 
 
 
 

Two plane mirrors are inclined at a certain angle. A ray of light coming parallel to one of the mirrors is rendered parallel to the second mirror after two reflections. The inclination between the mirror is

 
 
 
 

Two plane mirrors are inclined at 70s. A ray incident on one mirror at angle ?. After reflection, falls on the second mirror and is reflected from there parallel to the first mirror ? is

 
 
 
 

A number of images of a candle flame are seen in thick mirror

 
 
 
 

The image of our face in a plane mirror

 
 
 
 

The nature of image formed by a plane mirror is

 
 
 
 

When a ray or light enters a glass slab from air

 
 
 
 

When light passes from one medium to another, the physical quantity that remains unchanged is