Sunday, May 31, 2015

CBSE Class 8 - Science - CH 16 - Light (MCQ)

Light

MCQs

CBSE Class 8 - Science - CH 16 - Light (MCQ)
Laws Of Reflection
credits:wikipedia

Q1: Image formed by the plane mirror is:

(a) Always real
(b) Always virtual
(c) Sometimes real sometimes virtual
(d) None of these

Q2: The light ray, which strikes any surface, is called:

(a) Reflected Ray
(b) Normal
(c) Incident Ray
(d) Refracted Ray


Q3: The ray that comes back from the surface after reflection is called:

(a) Reflected Ray
(b) Normal
(c) Incident Ray
(d) Refracted Ray

Q4: Which of the following statement is correct:

(a) Angle of incidence is never equal to angle of reflection.
(b) Angle of incidence is always greater than angle of reflection.
(c) Angle of incidence is always smaller than angle of reflection.
(d) Angle of incidence is always equal to angle of reflection.


Q5: The property of plane mirror to make 'right appear as left' and vice versa, is called:


(a) Vertical inversion
(b) Lateral inversion
(c) Reflection
(d) Refraction

Q6: We can see ourselves in mirror or polished surface but not on walls because the reflection from walls is:

(a) Regular reflection
(b) Normal reflection
(c) Irregular reflection
(d) Specular reflection

Q7: Which of the following can make beautiful patterns due to the formation of multiple images:

(a) Kaleidoscope
(b) Periscope
(c) Microscope
(d) telescope

Q8: How many images will be formed when two plane mirrors are placed parallel to each other?

(a) two
(b) infinite
(c) one
(d) four

Q9: The phenomenon of breaking up of light into its seven constituent colours is known as ...

(a)  Reflection of light
(b) Refraction of light
(c) Dispersion of light
(d) Radiation of light

Q10: Which of the following part of eye controls the amount of light entering the eye by contracting or dilating?

(a) Retina
(b) Cornea
(c) Pupil
(d) Iris

Answer:
1: (b) Always virtual
2: (c) Incident Ray
3: (a) Reflected Ray
4: (d) Angle of incidence is always equal to angle of reflection.
5: (b) Lateral inversion
6: (c) Irregular reflection
7: (a) Kaleidoscope
8: (b) infinite
9: (c) Dispersion of light
10: (d) Iris

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