CBSE Questions for Class 7 Physics Light Quiz 5 - MCQExams.com

We can see a non-luminous object when light :
  • emitted by the object falls on the eye
  • is reflected from the object towards our eye
  • completely passes through the object
  • gets completely absorbed by the object
A ray of light is incident on a plane mirror at an angle of incidence $$30^{o}$$ to the normal.  The ray after reflection is deviated with an angle of:
  • $$ 30^{0}$$
  • $$ 60^{0}$$
  • $$ 90^{0}$$
  • $$ 120^{0}$$
Which mirror should be used to obtain a parallel beam of light from a small lamp?
  • Plane mirror
  • Convex mirror
  • Concave mirror
  • None of the above
The mirror used in search lights is:
  • Concave
  • Convex
  • Plane
  • None of these
........ images cannot be caught on a screen.
  • Real
  • Inverted
  • Virtual
  • Erect
The mirror used in motor vehicles near the driver's seat is a
  • Concave mirror
  • Convex mirror
  • Plane mirror
  • None of theses
A virtual image is one which:
  • Can be taken on a screen
  • Cannot be taken on a screen
  • Sometimes can be and sometimes cannot be taken on a screen
  • Is formed only by a concave mirror
Shaving mirrors are:
  • Convex mirrors
  • Concave mirrors
  • Plane mirrors
  • None of these
The concave mirrors are used in:
  • Reflecting telescope
  • Magic-lanterns
  • Cinema projectors
  • All of these
The image formed by a plane mirror is always ______ inverted.
  • Laterally
  • Virtually
  • Really
  • None of these
The mirror used by dentists to concentrate light on the tooth to be examined is a:
  • Concave mirror
  • Normal triangular mirror
  • Convex mirror
  • Plane mirror
........ images can be caught on a screen.
  • Real
  • Inverted 
  • Virtual
  • Erect
Which of the following mirror is used to concentrate light on a given spot?
  • Concave mirror
  • Convex mirror
  • Plane mirror
  • None of these
The light emanating from a torchlight is
  • Convergent
  • Divergent
  • Parallel
  • Irregular
Rectilinear propagation of light is :
  • Property of travelling in curved lines
  • Property of travelling in straight lines
  • Ability to bend around obstacles
  • Displaying the phenomenon of diffraction
Consider the following statements:
(a) Real image is always inverted
(b) Virtual image is always erect
(c) Image formed by a concave lens is always real and inverted.
Which of the above statement(s) is/are correct?
  • Only (a)
  • Only (b)
  • (a) and (b)
  • All of the above
Light shows:
  • Curvilinear propagation
  • Rectilinear propagation
  • Random propagation
  • None of the above
In the arrangement shown in fig, the image of the extended object as seen by the observer is:

159503_c7972d9b57114b3b9413af5be92e4e63.png
  • Real and inverted
  • Real and erect
  • Virtual and inverted
  • Virtual and erect
An optician, while testing the eyes of a patient, keeps a chart of letters $$3$$m behind the patient and asks her to see the letters on the image of chart formed in a plane mirror kept at distance $$2$$m in front of her. How far away is the chart seen by the patient?
  • $$3$$m
  • $$2$$m
  • $$6$$m
  • $$7$$m
An insect is sitting in front of a plane mirror at a distance $$1$$$$\  m $$ from it.(a) Where is the image of the insect formed?(b) What is the distance between the insect and its image?
  • $$(a)$$ $$2$$ $$m$$ behind the mirror $$(b)$$ $$1$$$$m$$
  • $$(a)$$ $$2$$$$m$$ infront of the mirror $$(b)$$ $$1$$$$m$$
  • $$(a)$$ $$1$$$$m$$ infront of the mirror $$(b)$$ $$2$$$$m$$
  • $$(a)$$ $$1$$$$m$$ behind the mirror $$(b)$$ $$2$$$$m$$
In a plane mirror the image is formed:
  • Behind the mirror 
  • In front  of mirror 
  • Both A & B
  • None of these

The phenomenon of rebounding and change in direction of light when it strikes the surface of a mirror is called ____________.
  • Refraction
  • Diffraction
  • Reflection
  • None of these
A virtual image :
  • cannot be caught on a screen
  • can be caught on a screen
  • can be caught on an eyepiece
  • is formed by a prism
A real image :
  • cannot be captured on a screen
  • can be captured on a screen
  • can be captured only on a celluloid screen
  • none of the above
We can see the objects only when:
  • reflected light from the objects reaches our eyes
  • the objects absorb all the light
  • when the objects allow all the light to pass through them
  • none of the above
Convex mirrors are used as rear view mirrors in the motor vehicles because :
  • they reflect light better than the other mirrors
  • they produce images which are more clearer than those produced by others
  • they produce magnified images
  • they form images which are much smaller than the objects
In which direction light travels?
  • Any random direction
  • In straight line
  • In curved path
  • None
___________ are used in telescopes to reflect light.
  • Concave mirrors
  • Convex mirrors
  • Plane mirrors
  • Convex lenses
Choose correct option to fill the blank.
An image formed by a ___________ mirror is always of the same size as that of the object.
  • Plane
  • Convex
  • Concave
  • All of the above
The mirror used as a side mirror in a scooter is
  • Convex mirror
  • Concave mirror
  • Concave lens
  • Convex lens
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