Geometrical Optics Test 02

Total Questions: 21

1 - Magnification of mirror is given by:

A ) m =p/q
B ) m = q/p ✅
C ) m =p×q
D ) m=1/p+q

4 - Focal length of the conceive mirror is:

A ) -ve
B ) +ve ✅
C ) Same
D ) zero

5 - Bouncing back of light after striking the surface is called:

A ) refraction
B ) reflection ✅
C ) diffraction
D ) interference

6 - The ratio of image height to object height is Called:

A ) linear magnification ✅
B ) Power
C ) refraction
D ) radius of curvature

7 - To correct the defect of vision frasightednesss which type of lens is used.

A ) Converging lens ✅
B ) Diverging lens
C ) Both
D ) All of these

8 - The critical angle for glass is:

A ) 24⁰
B ) 48⁰
C ) 42⁰ ✅
D ) 50⁰

9 - The critical angle for water is :

A ) 49⁰ ✅
B ) 42⁰
C ) 62⁰
D ) 52⁰

10 - Critical angle for diamond is:

A ) 60⁰
B ) 24⁰ ✅
C ) 26⁰
D ) 49⁰

11 - Angel opposite to the base of triangle of prism is called:

A ) Angle of incidence
B ) Angle of refraction
C ) Angle of prism ✅
D ) emerging angle

12 - The refracted light striking to the side of prism is called:

A ) Refrected ray
B ) Incident ray ✅
C ) reflected ray
D ) emergent ray

13 - To get virtual images from a convex lens the object is kept:

A ) On F
B ) Between F and 2F
C ) Beyond 2F
D ) Between O and F ✅

14 - Speed of light in glass:

A ) 2.0×10⁸ m/s ✅
B ) 3.0×10⁸ m/s
C ) 2.0 × 10⁶ m/s
D ) 3.0×10⁶ m/s

15 - To see from submarine and the ship at the surface of water, we use:

A ) telescope
B ) microscope
C ) Periscope ✅
D ) prism

16 - In totally reflecting prism one angle is of:

A ) 45⁰
B ) 90⁰ ✅
C ) 180⁰
D ) 120⁰

17 - In totally reflecting prism one angle is of 90⁰,and other two angle are of:

A ) 30⁰,30⁰
B ) 45⁰, 90⁰
C ) 45⁰, 45⁰ ✅
D ) 40⁰,40⁰

18 - Totally reflecting prims is used in:

A ) periscope
B ) binoculars
C ) periscope and binoculars ✅
D ) telescope

21 - Optical fibra are:

A ) cheap
B ) flexible
C ) lighter
D ) all of these