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
( C ) Shadow
( 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 )
