1.
A glass prism has-
(a) 5 rectangular surfaces
(b) 4 rectangular surfaces
(c) 2 triangular bases and 3
rectangular surfaces
(d) 2 rectangular surfaces and 3
triangular bases
ANS: 2 triangular bases and 3
rectangular surfaces
2.
A prism is used to-
(a) pass the light undeviated
(b) deviate a light path by
reflection only
(c) refract, reflect or diffract
the light depending on experimental condition
(d) deviate a light path by
refraction
ANS: deviate a light path by
refraction
3.
The angle between two lateral surfaces of a prism is called as
(a) angle of prism
(b) angle of refraction
(c) reflecting index of the
prism
(d) dispersion angle
ANS: angle of prism
4. The angle between two plane
rectangular refracting surfaces of a prism is called as
(a) refracting angle of the
prism
(b) angle of refraction
(c) reflecting angle of the
prism
(d) dispersion angle
ANS: refracting angle of the prism
5.
The angle between the directions of the incident ray and the emergent
ray is called-
(a) angle of deviation
(b) angle of refraction
(c) reflecting angle of the
prism
(d) dispersion angle
ANS: angle of deviation
6. For an equilateral prism the
angle of the prism is-
(a) 600
(b) 450
(c) 900
(d) 300
ANS: 600
7.
How many times refraction occurs when a ray passes through a prism?
(a) 1
(b) 4
(c) 3
(d) 2
ANS: 2
8.
What happens when white light is passed from air to glass prism?
(a) bends away from normal
(b) bends towards normal
(c) passes undeviated
(d) reflects back
ANS: bends towards normal
9. How many times does a ray of light
bend on passing through a prism?
(a) once
(b) twice
(c) thrice
(d) none of these
ANS: twice
10.
A glass prism placed in a homogeneous transparent medium will deviate an
incident ray
(a) always towards the base
(b) always away from its base
(c) towards its base, only if
the medium has refractive index greater than that of the glass.
(d) towards the base, only if
the medium has a refractive index less than that of the glass
ANS: towards the base, only if the
medium has a refractive index less than that of the glass
11. The angle between incident ray and
_____ ray is called angle of deviation.
(a) reflected
(b) refracted
(c) emergent
(d) normal
ANS: emergent ray
12. The ____ of the prism makes
emergent ray bend at an angle to the direction of the incident ray.
(a) transparency
(b) peculiar size
(c) plastic material
(d) size
ANS: peculiar shape
13. If angle of incidence is 420
and angle of emergence is 300, then angle of deviation
will be-
(a) 720
(b) 120
(c) 240
(d) 900
ANS: 120
(a) 300
(b) 700
(c) 1400
(d) 500
ANS: 500
15. A student is observing the diagram showing the path of
a ray of light passing through a glass prism. He would find that for all angles
of incidence the ray of light bends-
(а) towards the normal
while entering into the prism and away from the normal while emerging out of
the prism
(b) away from the normal while entering into the prism and towards the normal
while emerging out of the prism.
(c) away from the normal while entering as well as while emerging out of the
prism.
(d) towards the normal while entering as well as while emerging out of the
prism.
ANS: towards the normal while
entering into the prism and away from the normal while emerging out of the
prism
16.
A student
traces the path of a ray through a glass prism for four different values of
angle of incidence. On analyzing the diagrams he is likely to conclude that the
emergent ray
(a) is always parallel to the incident ray.
(b) is always perpendicular to the incident ray.
(c) is always parallel to the refracted ray.
(d) always bends at an angle to the direction of incident ray.
ANS: always bends at an angle to the direction of incident ray
17. Which image shows the deviation of light in a prism?
ANS: b
18. In the following diagram, the path of a
ray of light passing through a glass prism is shown:
In this diagram the angle
of incidence, the angle of emergence and the angle of deviation respectively
are (select the correct option):
(a) X, R and T
(b) Y, Q and T
(c) X, Q and P
(d) Y, Q and P
ANS: Y, Q and P
19. After tracing the path of a
ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r), angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked
angles are:
(a) ∠i and ∠r
(b) ∠i and ∠e
(c) ∠i, ∠e and ∠D
(d) ∠i, ∠r and ∠e
ANS: ∠i and ∠e
20. The following figure depicts the bending of a
ray of light on passing through a prism. Identify the angle of deviation from
the given choices.
(b) ∠CEF
(c) ∠CEB
(d) ∠DCI
ANS: ∠CEF
21. While performing the experiment to trace
the path of a ray of light passing through a glass prism, four students marked
the incident ray and the emergent ray in their diagrams in the manner shown
below
The correct path of the rays has been shown
by:
(a) I
(b) II
(c) III
(d) All of these
ANS: II
22. A given ray of light suffers
minimum deviation in an equilateral prism. Two additional prisms of identical
shape and of same material are placed as shown in the figure.
The ray will now suffer-
(a) greater deviation
(b) no deviation
(c) same deviation
(d) scattering
ANS: same deviation
23. In an experiment on tracing the path of the rays of light
passing through a glass prism, the correct setting of protractor (D) for
measuring the angle of incidence ∠i in diagram is
(a) i
(b) ii
(c) iii
(d) iv
ANS: i
24.
While performing experiment to trace
the ray of light through a triangular glass prism, a student is asked to draw
the boundary of a prism on a paper. This is done to
(a) see whether the given prism is triangular or
not.
(b) ensure that the prism is always kept within
the boundary during experiment.
(c) check whether the edges of the prism are
broken or not.
(d) make the diagram more clear.
ANS:
ensure that the prism is always kept within the boundary during experiment
25.
For tracing the path of a ray of
light through a glass prism, the ideal distance between two pins is,
(a) 2-3 cm
(b) 3-5 cm
(c) 6-8 cm
(d) 10 – 15 cm
ANS: 3-5
cm
26.
Four students A, B, C and D perform
experiment on tracing the path of light ray through a glass prism. The correct
position of the pins used to describe incident ray is shown on paper by four of
them, respectively as
The correct result is obtained by
(a) A and B both
(b) B and C both
(c) A and D both
(d) A only
ANS:
A only
27.
In an experiment on tracing the path
of ray of light passing through a glass prism, three students A, B, C performed
the experiment for three different sets of angles of incidence. The set taken
by them, were respectively as (15 , 25 , 45 ), (30 , 45 , 60 ) and (65 , 75 ,
85 ). The student/students who is/are likely to get best results is/are
(a) A only
(b) B only
(c) C only
(d) all of them
ANS:
B only
28.
While performing the experiment to
trace the path of a ray of light passing through a glass prism, four students
marked the incident ray and the emergent ray in their diagrams in the manner
shown below:
The correct figure is given in
(a) I
(b) II
(c) III
(d) IV
ANS:
III
29.
While performing the experiment on
tracing the path of a ray of light through a glass prism as shown in the given
diagram, four students interpreted the result as given below. At the minimum
deviation position of the prism, which one of the four interpretations is
correct?
(a) θ1 = θ3
(b) θ1 = θ2
(c) θ1 = θ4
(d) θ1 > θ3
ANS: θ1 =
θ3
30.
A student traces the path of a ray
of light passing through a triangular glass prism. For measuring the angle of
emergence, the correct setting of the protractor (D) corresponds to diagram
(a) (A)
(b) (B)
(c) (C)
(d) (D)
ANS: D
31. To trace the path of the ray of
light through a glass prism, four students A, B, C and D did the following:
A: Kept the eyes at certain moderate distance from the glass
prism while placing both the image pins.
B: Kept the eyes close to the glass prism while placing both
the image pins.
C: Kept the eyes close to the glass prism while placing first
image pin and far from the prism while placing the second image pin.
D: Kept the eyes at 45° angle while placing both the image
pins on a line which makes an angle of 30° with the normal.
The correct procedure is that of the student
(a) A
(b) B
(c) C
(d) D
ANS:
A
32. Which
of the following is the best set-up for tracing the path of ray of light
through a glass prism?
(a) (i) only
(b) (ii) only
(c) (iii) only
(d) (iv) only
ANS: (i)
only
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