Reflection and Refraction of Light

Total Questions: 20

4 - Which of the following is true for an image in a plane mirror?

A ) It is formed when light is blocked by an opaque object
B ) It is formed when allied passes through our transparent object
C ) It is of the same shape size and colour as the object ✅
D ) It is always black

5 - What happens when a light hits a shiny or smooth surface?

A ) It is disappeared
B ) It is refracted
C ) It is absorbed
D ) It is reflected ✅

6 - How is the angle of incidence related to the angle of reflection?

A ) It is greater
B ) It is smaller
C ) It is same ✅
D ) None of these

7 - Which of the following describes the image of the boy formed by the plane mirror?

A ) It will be upside down
B ) It will be in front of the mirror
C ) It will be larger than the boy
D ) It will be horizontally reversed left to right ✅

8 - Speed of light through air is about:

A ) 300000 Km/s ✅
B ) 250000 Km/s
C ) 225000 Km/s
D ) 200000 Km/s

9 - Speed of light through glass is about.

A ) 300000 Km/s
B ) 250000 Km/s
C ) 225000 Km/s
D ) 200000 Km/s ✅

10 - Speed of light is denoted by:

A ) L
B ) C ✅
C ) S
D ) D

11 - Angle of incidence is equal to the angle of reflection, It is first law of:

A ) Reflection ✅
B ) Refraction
C ) Diffraction
D ) Dispersion

15 - _____ is /are used to coat the backside of the mirror.

A ) Silver
B ) Aluminium
C ) Copper
D ) Silver and aluminium ✅

16 - In a convex mirror, focus is:

A ) Under the mirror
B ) In front of the mirror
C ) On the mirror
D ) Behind the mirror ✅

17 - Which type of image is formed in plane mirror.

A ) Real
B ) Virtual ✅
C ) Real and virtual
D ) None of these

18 - The image formed by a convex mirror:

A ) Real and upright
B ) Real and inverted
C ) Virtual and upright ✅
D ) Virtual and inverted

19 - The pole of spherical mirror is also called:

A ) Principal axis
B ) Focus
C ) Vertex ✅
D ) Focal leagth

20 - Image distance for a virtual image is always taken:

A ) Zero
B ) Positive
C ) Negative ✅
D ) +2