CBSE Questions for Class 10 Physics Light Reflection And Refraction Quiz 1 - MCQExams.com

Magnification produced by a rear view mirror fitted in vehicles:
  • is less than one
  • is more than one
  • is equal to one
  • can be more than or less than one depending upon the position of the object in front of it
An image of the same size as that of the object cannot be produced by :
  • a plane mirror
  • a concave mirror
  • a convex mirror
  • a convex lens
State whether true or false.
A ray of light which emerges after bouncing, off the surface of a mirror is called an incident ray.
  • True
  • False
A perpendicular drawn at the point of incidence of a light ray on the surface of a mirror is called -
  • incident ray
  • reflected ray
  • normal
  • none of these
Observe the given figure and name the following rays:
Ray AB, Ray BC, Ray CD

592641.png
  • Incident Ray, Refracted Ray, Emergent Ray
  • Refracted Ray, Incident Ray, Emergent Ray
  • Emergent Ray, Refracted Ray, Incident Ray
  • Refracted Ray, Emergent Ray, Incident Ray
The distance between the focus and the pole of the mirror is called :
  • Focal length
  • Radius of curvature
  • Principal axis
  • Diameter of curvature
State whether true or false.
The line drawn perpendicular to the mirror at the point of incidence is called the reflected ray.
  • True
  • False
The light ray which comes out from the surface after reflection is called:
  • incident ray
  • reflected ray
  • normal ray
  • emergent ray
.......... occurs when a light ray bounces back from a barrier.
  • Refraction
  • Reflection
  • Dispersion
  • Scattering
State whether true or false.
The geometric centre of the hollow sphere of which a spherical mirror is a part is called its focal length.
  • True
  • False
A ray of light which bounces off the surface of mirror is called :
  • Normal
  • Incident ray
  • Reflected ray
  • Irregular ray

The distance CP is the :


73573_c9c9d49461794f1cbc1a828753fbfc00.png
  • Center of curvature
  • Radius of curvature
  • Focal length
  • None of these

The distance FP is the :


73574_774cf0f14c494b4dacbdb572ef084028.png
  • Radius of curvature
  • Focal length
  • Center of curvature
  • None
The focal length of the concave mirror in the experimental set up, shown below
equals :

86046.jpg
  • 10.3 cm
  • 10.0 cm
  • 11.0 cm
  • 12.2 cm
The refraction of light is commonly known as :
  • Bending
  • Scattering
  • Reflection
  • Interference

The point P is the:


73576_f9ac5b18aefc42058ba8c467f72f9e10.png
  • Principal focus
  • Principal axis
  • Pole
  • None of these
What is the phenomenon of light coming back after hitting a smooth plane surface called?
  • Reflection
  • Refraction
  • Dispersion
  • Splitting
Image of our face in a plane mirror is :
  • Real
  • Magnified
  • Diminished
  • None of these
The line joining the pole and the centre of curvature of a mirror is called the :
  • Aperture
  • Principal section
  • Principal axis
  • Pole
A lens is called a thin lens, if its overall thickness is :
  • Small
  • Large
  • Infinitely large
  • None of these

The angle of incidence is given by the angle :


73565_35b3b4e447e84439aed44e6c1bd2a063.png
  • PON
  • QOB
  • NOQ
  • AOP
The light ray which strikes any polished surface at some angle is called:
  • reflected ray
  • incident ray
  • normal ray
  • none of these
If a ray of light goes from a rarer medium to a denser medium , will it bend towards the normal or away from it ?
  • bends away from the normal
  • bends towards the normal
  • goes undeviated
  • is reflected back
The focal length of a lens is $$-0.4\ m$$. The lens is:
  • Convex only
  • Concave only
  • It may be convex or conacve
  • None of these
Fill in the blanks:
Principal axis is also called ________ of the lens.
  • Optical axis
  • x-axis
  • y-axis
  • axis
The focal length can be expressed in:
  • metre
  • Dioptre
  • Watt
  • Horse power
A ray of light is incident perpendicularly on a glass slab. The angle of incidence is :
  • $$0^{\circ}$$
  • $$45^{\circ}$$
  • $$90^{\circ}$$
  • $$180^{\circ}$$
The phenomenon due to which a ray of light .......... from its path while travelling from one optical medium to another optical medium is called refraction.
  • reflected
  • deviates
  • normally
  • less
.................. ray is the ray of light striking the surface of a reflector.
  • Incident
  • refracted
  • reflected
  • All the above
Which of the following term is not associated with a lens?
  • Aperture
  • Focal length
  • Principal focus
  • Momentum
A ray of light incident on glass finally emerges out of it. The ray which emerges out is called :
  • incident ray
  • refracted ray
  • emergent ray
  • none of these
State the condition when a lens is called an equi-convex or equi-concave.
  • When radii of curvature of the two surfaces of lens are equal.
  • When height of the two lens are equal.
  • When radii of curvature of the two surfaces of lens unequal.
  • None of the above
Fill in the blanks:
The phenomenon of change in the _____of light when it passes from one transparent medium to another is refraction.
  • speed
  • direction
  • both A & B
  • None of the above
A beam of light incident on a convex lens parallel to its principal axis converges at a point on the principal axis. Name the point :
  • First focus
  • Second focus
  • First centre
  • Second centre
A beam of light incident on a thin concave lens parallel to its principal axis diverges and appears to come from a point on the principal axis. Name the point :
  • First focus
  • Second focus
  • First centre
  • Second centre
Name the mirrors shown in figure $$(a)$$ and $$(b)$$ :
202630_2e593ed6e0c5414fb71a293a429d1962.png
  • (a) and (b) both are convex mirrors
  • (a) and (b) both are concave mirrors
  • (a) is convex mirror and (b) is concave mirror
  • (a) is concave mirror and (b) is convex mirror
The phenomenon of light coming back after hitting a smooth plane surface is called :
  • Reflection
  • Refraction
  • Dispersion
  • Total internal reflection
The phenomenon of light passing through the object is called :
  • Reflection
  • Refraction
  • Dispersion
  • Total internal reflection
Convex lens is always :
  • tapering at edges
  • thicker in middle
  • converges rays at a point
  • all of the above
A ray of light incident at a point on the principal axis of a convex lens passes undeviated through the lens. What special name is given to this point on the principal axis?
  • Optical centre
  • Second centre
  • First focus
  • Second focus
A ray of light, after refraction through a convex lens emerges parallel to the principal axis. The incident ray when produced appear to come from a point on principal axis. Name the point :
  • first focus
  • first centre
  • last focus
  • last centre
The phenomenon of light bending due to change of medium is called:
  • Reflection
  • Refraction
  • Dispersion
  • Total internal reflection
Reflection can occur on
  • Transparent surfaces
  • Translucent surfaces
  • Opaque surfaces
  • All of the above
Fill in the blanks to complete the following sentences:

i) A ray travelling towards the mirror is the _________.
ii) Angle between reflected ray and normal is the _________.
iii) The angle between reflecting surface and the reflected ray is the _________.
  • i-incident ray ,ii-angle of reflection ,iii-glancing angle of reflection
  • i-normal ray ,ii-glancing angle of reflection ,iii-angle of incidence
  • i-reflected ray ,ii glancing angle of incidence ,iii-glancing angle of reflection
  • i-reflected ray ,ii-angle of incidence ,iii- angle of reflection
The angle of incidence in a glass slab is ______ the angle of emergence.
  • Equal to
  • Smaller than
  • Greater than
  • Dependent on
Bouncing of light into the same medium, from which the light ray is incident, is termed as :
  • refraction
  • dispersion
  • reflection
  • scattering
Whenever light travels from denser medium to a rarer medium:
  • it bends away from the normal
  • it bends towards the normal
  • it passes undeviated
  • it always reflects back
When a ray of light passes through a rectangular glass slab, the angle of emergence
  • is less than the angle of incidence
  • is greater than the angle of incidence
  • is equal to the angle of incidence
  • is zero always
In reflection, light travels through:
  • only one medium
  • two media
  • three media
  • more than three media
The angle between the incident ray and the reflecting surface is known as:
  • glancing angle of incidence
  • angle of incidence
  • glancing angle of reflection
  • angle of reflection
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