Class 8 Science Objective Chapter – 16 Light

Here we are providing Class 8 Science Objective Chapter – 16 Light because its very important for Class 8 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 8 Science Objective Chapter – 16 Light is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 8 Science Objective Chapter – 16 Light Wastewater Story 100+ questions  so that students practice more and more. If you want class wise Notes Then Click Here

Class 8 Science Objective Chapter – 16 Light

1.We are able to see an object due to the presence of

( A ) light

( B ) dark

( C ) refraction

( D ) object

Ans – ( A )

2. Beam of light striking the reflecting surface is called

( A ) reflecting ray

( B ) incident ray

( C ) refracted ray

( D ) normal ray

Ans – ( B )

3.he impression or sensation remains on the retina for about how may seconds even after removal of the object ?

( A ) 1 second

( B ) 1/16th of a second

( C ) 16 seconds

( D ) 1 minute

Ans – ( B )

4. What makes objects visible?

( A ) The absorption of light by objects

( B ) The reflected light from the object

( C ) The total internal reflection taking place in an object

( D ) The refracted light from the object

Ans – ( B )

5.The bouncing back of light into the same medium is called

( A ) refraction

( B ) reflection

( C ) dispersion

( D ) diffraction

Ans – ( B )

6.The cells present in the retina of eye and responding to intensity of light are:

( A ) Rod-shaped cells

( B ) Both of these

( C ) Cones

( D ) None of these

Ans – ( A )

7. If the angle of incidence is 50°, then calculate the angle between the incident ray and the reflected ray.

( A ) 50°

( B ) 100°

( C ) 130°

( D ) 80°

Ans – ( B )

8.A mirror has _____ surface.

( A ) rough

( B ) polished

( C ) dark

( D ) all of these

Ans – ( A )

9.The cells present in the retina of eye and responding to colour are:

( A ) Rod-shaped cells

( B ) Both of these

( C ) Cones

( D ) None of these

Ans – ( C )

10. _________ refers to collection of rays.

( A ) Photon

( B ) Beam

( D ) Image

Ans – ( B )

11.Maximum part of light is reflected by

( A ) opaque object

( B ) translucent object

( C ) transparent object

( D ) all of these

Ans – ( A )

12.The disease of eye in which crystalline lens becomes hazy or even opaque due to development of membrane over it is :

( A ) Myopia

( B ) Cataract

( C ) Hypermetropia

( D ) Presbyopia

Ans – ( B )

13. Which of the following travels faster?

( A ) Jet Aero plane

( B ) Sound

( C ) Light

( D ) Supersonic plane

Ans – ( C )

14.Angle of incidence is equal to the angle of reflection:

( A ) Always

( B ) Sometimes

( C ) Under special conditions

( D ) Never

Ans – ( A )

15.The perpendicular drawn to the reflecting surface is called

( A ) normal

( B ) incident ray

( C ) reflected ray

( D ) none of these

Ans – ( A )

16. What makes the object visible?

( A ) Size

( B ) Time

( C ) Colour

( D ) Light

Ans – ( D )

17.Image formed by a plane mirror is:

( A ) Virtual, behind the mirror and enlarged

( B ) Virtual, behind the mirror and of the same size as the object

( C ) Real at the surface of the mirror and enlarged .

( D ) Real, behind the mirror and of the same size as the object

Ans – ( B )

18. An example of luminous object is

( A ) Star

( B ) Smooth surface

( C ) Mirror

( D ) Cloth

Ans – ( A )

19.Reflection is:

( A ) absorption of light rays by the surface of an object

( B ) passing of light rays through the surface of an object

( C ) bouncing back of light rays from the surface object

( D ) None of these

Ans – ( C )

20. With what is glass coated in order to convert it into a mirror?

( A ) Silver

( B ) Copper

( C ) Aluminium

( D ) Platinum

Ans – ( A )

21.Splitting of light into its colours is known as:

( A ) spectrum

( B ) dispersion

( C ) rainbow

( D ) none of these

Ans – ( B )

22. In a periscope, how are the reflecting mirrors arranged?

( A ) Perpendicular to each other

( B ) Parallel to each other

( C ) At an angle of 90°

( D ) At an angle of 60°

Ans – ( A )

23.Which of the following is not a source of light:

( A ) Tubelight

( B ) The sun

( C ) The moon

( D ) Fire fly

Ans – ( C )

24. How many images are obtained when plane mirrors are arranged parallel to each other?

( A ) A single image

( B ) Two images

( C ) Infinite number of images

( D ) Zero image

Ans – ( C )

25.Which type of mirror is used to obtain a virtual, laterally inverted image and equal in size of an object ?

( A ) plane mirror

( B ) concave mirror

( C ) convex mirror

( D ) all of these

Ans – ( A )

26. Angle of incidence is always

( A ) Equal to angle of reflection

( B ) Equal to angle of refraction

( C ) More than angle of reflection

( D ) Less than angle of reflection

Ans – ( A )

27.The angle between incident ray and normal is called the angle of:

( A ) reflection

( B ) incidence

( C ) refraction

( D ) none of these

Ans – ( B )

28. Which of the following is used by E.N.T. doctors?

( A ) Convex mirror

( B ) Convex lens

( C ) Plane mirror

( D ) Concave mirror

Ans – ( D )

29.The lens present in eye is:

( A ) convex lens

( B ) concave lens

( C ) either convex or concave

( D ) none of these

Ans – ( A )

30. What is the phenomenon of light bouncing back into the same medium called?

( A ) Reflection

( B ) Refraction

( C ) Dispersion

( D ) Splitting

Ans – ( A )

31.Kaleidoscope is based on the pattern of:

( A ) reflection

( B ) multiple reflection

( C ) spectrum

( D ) diffused reflection

Ans – ( B )

32. What is the nature of image formed on the retina of human eye of an object?

( A ) Virtual and erect

( B ) Virtual and inverted

( C ) Real and erect

( D ) Real and inverted

Ans – ( D )

33.A smooth shining surface, which rebounds the light back in same or in different direction, is called

( A ) a mirror

( B ) a lens

( C ) reflection of light

( D ) point of incidence

Ans – ( A )

34. Convex lens focus a real, point sized image at focus, the object is placed

( A ) At focus

( B ) Between F and 2F

( C ) At infinity

( D ) At 2F

Ans – ( C )

35.Band of seven colours is called

( A ) VIBGYOR

( B ) spectrum

( C ) dispersion

( D ) reflection

Ans – ( B )

36. Braille system is used by

( A ) Hearing impaired

( B ) Black people

( C ) Blind people

( D ) African people

Ans – ( C )

37.Front balged part of the eyeball is called

( A ) cornea

( B ) choroid

( C ) pupil

( D ) retina

Ans – ( A )

38. Speed of light is fastest in

( A ) Air

( B ) Water

( C ) Diamond

( D ) Glass

Ans – ( A )

39.Which one of the following statements is correct regarding rods and cones in the human eye?

( A ) Cones are sensitive to dim light

( B ) Cones are sensitive to bright light

( C ) Rods are sensitive to bright light

( D ) Rods can sense colour

Ans – ( B )

40. Splitting of white rays of light into seven colours is called

( A ) Dispersion of light

( B ) Reflection of light

( C ) Refraction of light

( D ) Scattering of light

Ans – ( A )

41.In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as

( A ) i = r

( B ) i < r

( C ) i > r

( D ) no definite relation

Ans – ( A )

42. A number of rays from different direction assemble at point are called

( A ) Intersecting rays

( B ) Parallel rays

( C ) Divergent rays

( D ) Convergent rays

Ans – ( D )

43.Name the type of mirror used as a backview mirror.

( A ) Plane mirror

( B ) Concave mirror

( C ) Convex mirror

( D ) Any of these

Ans – ( C )

44. What is the name of object through which light can pass?

( A ) Opaque

( B ) Translucent

( C ) Transparent

( D ) Luminous

Ans – ( C )

45.Visually impaired people can read and write using

( A ) electronic writer

( B ) digital pens

( C ) braille system

( D ) hearing aids

Ans – ( C )

46. The image formed by plane mirror is

( A ) real and inverted

( B ) real and erect

( C ) virtual and inverted

( D ) virtual and erect

Ans – ( D )

47.The image formed by a camera and a simple microscope are respectively

( A ) real and real

( B ) real and virtual

( C ) virtual and virtual

( D ) virtual and real

Ans – ( B )

48. The process of banding of seven colours is called

( A ) dispersion

( B ) spectrum

( C ) reflection

( D ) normal

Ans – ( A )

49.What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

( A ) 60°

( B ) 45°

( C ) 90°

( D ) 180°

Ans – ( B )

50. From a source light travels as rays which are

( A ) Divergent

( B ) Convergent

( C ) Parallel

( D ) Diffused

Ans – ( C )

51.The splitting of white light into its seven constituent colours is called

( A ) refraction

( B ) dispersion

( C ) deviation

( D ) reflection

Ans – ( B )

52. What happens in lateral inversion?

( A ) The right side of the object will be on the right side of the image.

( B ) The left side of the object will be on the left side of the image.

( C ) The top of the object will be the bottom of the object.

( D ) The right side of the object will be on the left side of the image.

Ans – ( D )

53.The defect due to which a person is not able to see the distant objects clearly:

( A ) Myopia

( B ) Hypermetropia

( C ) Cornea

( D ) Cataract

Ans – ( A )

54. The angle of reflection is equal to the angle of incidence

( A ) Sometimes

( B ) Always

( C ) Never

( D ) Under special case

Ans – ( B )