Phy 102 tutorial questions on light...P

Phy 102 tutorial questions on light...
Question: Light is a form of
energy produced by a ______.
1.luminous object
2.transparent object
3.non-luminous object
4.opaque object
Answer: 1
Question: An example for non-
luminous object is ___________.
1.a candle
2.the sun
3.an electric bulb
4.the moon
Answer: 4
Question: The phenomenon by
which the incident light falling on
a surface is sent back into the
same medium is known as ________.
1.polarization
2.reflection
3.refraction
4.absorption
Answer: 2
Question: When light is incident
on a polished surface ___________
reflection takes place.
1.regular
2.irregular
3.diffused
4.normal
Answer: 1
Question: An object becomes
invisible when it undergoes ______
reflection.
1.regular
2.irregular
3.diffused
4.normal
Answer: 1
Question: According to the laws
of reflection,
1. i = r
2. i > r
3. r > i
4.
Answer: 1
Question: The image formed by a
plane mirror is always _______.
1.real and erect
2.virtual and erect
3.real and inverted
4.virtual and inverted
Answer: 2
Question: The centre of the
sphere of which the spherical
mirror forms a part is called
____________.
1.centre of curvature
2.focus
3.pole
4.vertex
Answer: 1
Question: The focus of a concave
mirror is ________.
1.real
2.virtual
3.undefined
4.at the pole
Answer: 2
Question: A converging mirror is
known as ________.
1.convex mirror
2.plane mirror
3.concave mirror
4.cylindrical mirror
Answer: 3
Question: The relation between
the focal length and radius of
curvature of a mirror is _______.
1.
2.R + 2 = f
3.f = R/2
4.f = 2 R
Answer: 3
Question: Radius of curvature of
a concave mirror is always _____ to
the mirror.
1.parallel
2.perpendicular
3. inclined at 60o
4. inclined at 45o
Answer: 2
Question: An image formed by a
convex mirror is always ________.
1.virtual, erect and diminished
2.virtual, real and magnified
3.real, inverted and diminished
4.real, erect and magnified
Answer: 1
Question: If the image formed by
a concave mirror is virtual, erect
and magnified, then the object is
placed __________.
1. between the pole of the mirror and
the focus
2.beyond the centre of curvature
3.at the centre of curvature
4.at the focus
Answer: 1
Question: Dentists use a
_____________ to focus light on the
tooth of a patient.
1.concave mirror
2.convex mirror
3.plane mirror
4.cylindrical mirror
Answer: 1
Question: An object is placed 1.5
m from a plane mirror. How far is
the image from the person?
1.3 m
2.1.5 m
3.2 m
4.1 m
Answer: 1
Question: An object placed 2m
from a plane mirror is shifted by
0.5 m away from the mirror. What
is the distance between the object
and its image?
1.2 m
2.1.5 m
3.5 m
4.3 m
Answer: 3
Question: What is the value of q
in the following diagram?
1. 30 o
2. 45 o
3. 90 o
4. 60 o
Answer: 4
Question: What is the angle
between the incident and reflected
rays when a ray of light is incident
normally on a plane mirror?
1. 90 o
2. 45 o
3. 180o
4.0
Answer: 4
Question: Name the type of
image that can be obtained on a
screen.
1.Virtual
2.Real
3.Diverging
4.Converging
Answer: 2
Question: A ray of light is
incident on a plane mirror and the
angle of incidence is 25 o. What is
the angle of reflection?
1.0
2. 50 o
3. 90 o
4. 25 o
Answer: 4
Question: A ray of light is
incident on a plane mirror and the
angle of reflection is 50 o.
Calculate the angle between the
incident ray and the reflected ray.
1. 50 o
2. 25 o
3. 90 o
4. 100o
Answer: 4
Question: Which of the following
is used to make a periscope?
1.Concave mirror
2.Convex mirror
3.Plane mirror
4.Lens
Answer: 3
Question: Which mirror has a
wider field of view?
1.Convex mirror
2.Concave mirror
3.Plane mirror
4.Cylindrical mirror
Answer: 1
Question: The focal length of a
concave mirror is 15 cm. What is
its radius of curvature?
1.15 cm
2.30 cm
3.7.5 cm
4.45 cm
Answer: 2
Question: The focal length of a
mirror is 15 cm. Identify the type
of mirror.
1.Concave mirror
2.Plane mirror
3.Convex mirror
4.Cylindrical mirror
Answer: 3
Question: A ray of light passing
through the _______ retraces its
path.
1