Question 1
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 2
Question: An example for non-luminous object is ___________.
| 1. | a candle |
| 2. | the sun |
| 3. | an electric bulb |
| 4. | the moon |
Answer: 4
Question 3
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 4
Question: When light is incident on a polished surface ___________ reflection takes place.
| 1. | regular |
| 2. | irregular |
| 3. | diffused |
| 4. | normal |
Answer: 1
Question 5
Question: An object becomes invisible when it undergoes ______ reflection.
| 1. | regular |
| 2. | irregular |
| 3. | diffused |
| 4. | normal |
Answer: 1
Question 6
Question: According to the laws of reflection,
| 1. |  i =  r |
| 2. |  i >  r |
| 3. |  r >  i |
| 4. |  |
Answer: 1
Question 7
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 8
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 9
Question: The focus of a concave mirror is ________.
| 1. | real |
| 2. | virtual |
| 3. | undefined |
| 4. | at the pole |
Answer: 2
Question 10
Question: A converging mirror is known as ________.
| 1. | convex mirror |
| 2. | plane mirror |
| 3. | concave mirror |
| 4. | cylindrical mirror |
Answer: 3
Question 11
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 12
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 13
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 14
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 15
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 16
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 17
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 18
Question: What is the value of
q in the following diagram?
| 1. | 30o |
| 2. | 45o |
| 3. | 90o |
| 4. | 60o |
Answer: 4
Question 19
Question: What is the angle between the incident and reflected rays when a ray of light is incident normally on a plane mirror?
| 1. | 90o |
| 2. | 45o |
| 3. | 180o |
| 4. | 0 |
Answer: 4
Question 20
Question: Name the type of image that can be obtained on a screen.
| 1. | Virtual |
| 2. | Real |
| 3. | Diverging |
| 4. | Converging |
Answer: 2
Question 21
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. | 50o |
| 3. | 90o |
| 4. | 25o |
Answer: 4
Question 22
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. | 50o |
| 2. | 25o |
| 3. | 90o |
| 4. | 100o |
Answer: 4
Question 23
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 24
Question: Which mirror has a wider field of view?
| 1. | Convex mirror |
| 2. | Concave mirror |
| 3. | Plane mirror |
| 4. | Cylindrical mirror |
Answer: 1
Question 25
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 26
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 27
Question: A ray of light passing through the _______ retraces its path.
| 1. | focus |
| 2. | centre of curvature |
| 3. | pole |
| 4. | vertex |
Answer: 2
Question 28
Question: When an object is placed at the focus of a concave mirror, the image will be formed at ________.
| 1. | infinity |
| 2. | focus |
| 3. | centre of curvature |
| 4. | pole |
Answer: 1
Question 29
Question: Butter paper is an example for _______ object.
| 1. | a transparent |
| 2. | a translucent |
| 3. | an opaque |
| 4. | a luminous |
Answer: 2
Question 30
Question: An object of size 2.0 cm is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror equals to the radius of curvature. The size of the image will be ______________.
| 1. | 0.5 cm |
| 2. | 1.5 cm |
| 3. | 1.0 cm |
| 4. | 2.0 cm |
Answer: 4
Question 31
Question: If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will __________________.
| 1. | pass through the focus |
| 2. | pass through the centre of curvature |
| 3. | pass through the pole |
| 4. | retrace its path |
Answer: 4
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