CBSE Questions for Class 6 Physics Light Shadows And Reflections Quiz 3 - MCQExams.com

An object is transparent if you can see through it clearly.
  • True
  • False
Formation of shadows can be explained by :
  • Rectilinear propagation of light
  • Curvilinear propagation of light
  • The total internal reflection
  • Refraction
Nature of the shadow depends on :
  • The relative distance between the source of light and the object
  • The relative size of the source of light and the object
  • The angle between the source of light and the object
  • All of the above

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
What is the angle of incidence if a ray is reflected by a plane mirror back along its original path?
  • $$0^{\circ}$$
  • $$90^{\circ}$$
  • $$45^{\circ}$$
  • $$30^{\circ}$$
Which fact can be established by a pinhole camera?
  • Light travels in straight lines
  • Images are always inverted
  • Image gets inverted when the light travels through a hole
  • No specific conclusion
The shadow below a tree has bright spots in it because :
  • the light comes through circular gaps
  • the light bends around the leaves to form circular spots
  • the gaps between the leaves act as the pin holes
  • the leaves are circular
The length of the shadow will be shortest when
  • The angle between the source of light and the object is 45
  • The source of light and the object are parallel to each other
  • The source of light and the object are perpendicular to each other
  • The angle between the source of light and the object is 60
The shadow below a tree has bright spots in it because:
  • The light comes through circular gaps
  • The light bends around the leaves to form circular spots
  • The gaps between the leaves act as the pin holes
  • The leaves are circular
Which of the following type of bodies form sharp shadows when placed in the path of light?
  • Transparent
  • Translucent
  • Transparent and translucent
  • Opaque
A body which allows most of the light to pass through it is called a :
  • transparent body
  • opaque body
  • translucent body
  • light medium
A substance through which light can pass completely is called a/an
  • transparent body
  • translucent body
  • opaque body
  • None of the above
In a room lighted by an electric bulb, it is found that the shadow of the ceiling fan hung in the centre is falling on a wall opposite to the door. What can you say about the position of the bulb?
  • On the wall having the door
  • On the wall facing the door
  • On the wall on your right as you enter the room
  • On the wall on your left as you enter the room
Which of the following body allows only a part of the light to pass through it?
  • Oiled paper
  • Brick
  • Wood
  • Air
A medium which partially allows the light rays to pass through it is called -
  • transparent
  • opaque
  • non-luminous
  • translucent
Glass allows light to pass through it because it is -
  • transparent
  • opaque
  • luminous
  • non-luminous
Change in the direction of light when it falls on an object is called :
  • Reflection
  • Refraction
  • Absorption
  • Adsorption
  • None of these
The colour of shadow formed by red light is:
  • Grey
  • Blue
  • Black
  • Green
  • Red
A body which allows almost all the light to pass through it and does not reflect any light is a-
  • transparent body
  • opaque body
  • translucent body
  • polished surface
Which of the following reflects the light instead of refracting it?
  • Paper
  • Lens
  • Glass
  • Shiny silver mirrors
  • All of these
Shadows are formed when light falls on transparent body. True or false.
  • True
  • False
Cellophane paper is an example of -
  • An opaque object
  • A translucent object
  • A transparent object
  • A luminous object
Butter paper is a ................. object.
  • Transparent
  • Translucent
  • Opaque
  • None of these
  • Answer required
State whether true or false.
Gold is an example of a translucent metal. 
  • True
  • False
Air is a transparent medium.
  • True
  • False
Select the odd one out w.r.t. transparency (air, fog, mist, tissue paper)
  • air
  • fog
  • mist
  • tissue paper
State whether true or false.
The shadow formed by an object is always of the same size as the object.
  • True
  • False
State whether true or false.
Opaque objects allow light to pass through them.
  • True
  • False
Ground glass is a _________ body.
  • translucent
  • transparent
  • opaque
  • oblique
Thin glass is a transparent body. State whether true or false.
  • True
  • False
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