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

Find out the only wrong statement in the following:
  • Light travels with a speed greater than that of sound
  • Light cannot travel through vacuum
  • Light travels in a straight line
  • Light has no weight
When rays of light fall on a convex lens, it
  • Converges them
  • Does not bend them
  • Diverges them
  • Enlarges them
The image of our face in a plane mirror is :
  • real
  • magnified
  • diminished
  • virtual
Find the correct statements related to the image formed by the plane mirror from  the given statements below.
  • The image formed is laterally inverted, virtual and erect.
  • The size of the image is equal to the size of the object.
  • The object distance from the plane mirror is equal to the image distance from the plane mirror.
  • All the above
The path along which light travels in a homogenous medium is called the
  • beam of light
  • ray of light
  • pencil of light
  • none of these
State whether true or false.
A convex mirror is used as a reflector in the head lights of a car.
  • True
  • False
Change in the direction of light when it falls on an object is called :
  • Reflection
  • Refraction
  • Absorption
  • Adsorption
  • None of these
An image which can be only seen by the eye but cannot be taken on a screen is called a ________ .
  • virtual image
  • real image
  • artificial image
  • shadow
Name the image which cannot be obtained on the screen 
  • Virtual image
  • Erect Image
  • Real Image 
  • Inverted Image 
If a lens diverges a parallel beam of light, the lens is -
  • Convex
  • Concave
  • Cylindrical
  • Parabolic
When a divergent beam of light is incident on a plane mirror, the image formed is
  • Upright and real
  • Upright and virtual
  • Inverted and virtual
  • Inverted and real
Is it possible to photograph a virtual image?
  • Yes
  • No
  • Sometimes
  • Yes, provided that object is virtual
State whether true or false.
A concave mirror is always used as a street light reflector.
  • True
  • False
When sun rays are passed through a glass prism it gets
  • Deviated, but not dispersed
  • Deviated and dispersed
  • Dispersed, but not deviated
  • Neither deviated nor dispersed
What is the basic difference between a real image and a virtual image ?
  • Real image are the image that can be obtained on a screen whereas virtual image cannot be obtained on the screen
  • Virtual image can be obtained on a screen while real images cannot be obtained on a screen
  • Virtual images are formed only in refraction not in reflection while real image can be formed in both
  • Virtual images are formed only in reflection while real image are also only found in refraction
Which mirror is used as a rear view mirror in vehicles?
  • Plain
  • Convex
  • Concave
  • Spherical
An object is placed at a distance of $$0.25m$$ in front of a plane mirror. The distance between the object and the image is:
  • $$0.5m$$
  • $$1m$$
  • $$0.25m$$
  • $$0.75m$$
When a beam of light comes from an object appears to meet at a point after reflection from a mirror, then the image formed is known as :
  • real image
  • virtual image
  • incident image
  • all of the above
An image, that is not produced by light rays coming from the object, but is the result of our brain's interpretations, is called: 
  • a real image
  • an imaginary image
  • a virtual image
  • nothing as no such image is ever produced
Fill in the blank:

A convex mirror is used as a rearview mirror in automobiles as it covers a ______ area behind the driver.
  • Wide
  • Narrow
  • Neither A nor B
  • Very narrow
What type of mirrors are used in ATM counters?
  • Concave
  • Convex
  • Plane
  • None
A man is standing in between 2 parallel mirrors, Mirror A and Mirror B. He is looking at Mirror A. Chose the right option for images formed in Mirror B:
  • All Images in Mirror B are laterally inverted with respect to the man.
  • Half Images in Mirror B are laterally inverted with respect to the man.
  • All Images in Mirror B are exactly same with respect to the man.
  • Half Images in Mirror B are exactly same with respect to the man.
Real images are always
  • Erect
  • Smaller is size
  • Inverted
  • Large in size
Real images are those that can be caught on screen.
  • True
  • False
Mark the incorrect statement:
  • Light travels along a straight line.
  • Mirror changes the direction of light falling on it
  • Things are only visible when light from our eyes reaches the object.
  • All are true.
A convex mirrors is used to ________ the light rays.
  • diverge
  • converge
  • parallel
  • absorb
Mirror used in solar furnace:
  • Concave mirror
  • Convex mirror
  • Parabolic mirror
  • Bi concave mirror
When a beam of light from an object appears to meet at a point after reflection from a mirror then the image formed is known as:
  • Real image
  • Virtual image
  • Incident image
  • All
Use of concave mirrors:
  • for examining internal parts of ear, nose, mouth by physicians
  • to focus sunlight to produce heat in solar furnaces
  • as reflectors in headlights of vehicles, torch light to produce strong parallel beam of light
  • all of the above
Rear view mirrors in vehicles forms:
  • Real Image
  • Virtual Image
  • Both A and B
  • Neither A nor B
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