CBSE Questions for Class 7 Physics Light Quiz 3 - MCQExams.com

The image which can be obtained on a screen is called
  • a virtual image
  • a real image
  • either a real or a virtual image
  • neither a real nor a virtual image
_________ discovered that white light consists of seven colours.
  • Walt Disney
  • Frank Starling
  • Laplace
  • Sir Isaac Newton
Image formed by a plane mirror is
  • Erect, virtual, same size as the object
  • Inverted, real, smaller size as the object
  • Erect, real, same size as the object
  • Inverted, virtual, smaller size as the object
How many colored components does white light have?
  • 4
  • 5
  • 6
  • 7
Image of an object is seen in a plane mirror, the distance from the mirror to the image depends on
  • The wavelength of light
  • The distance of the object from the mirror
  • The distance of both the observer and the object to the mirror
  • The thickness of the mirror
No matter how far you stand from a mirror, your image always appears erect. The mirror is likely to be:
  • Plane
  • Concave
  • Both A and B
  • None
____ is an example of a light having a spectrum of 7 colors.
  • Sunlight
  • White light
  • Both A and B
  • None of these
The image which can not be taken on the screen is called
  • a real image
  • a virtual image
  • either a real or a virtual image
  • neither a real nor a virtual image
A boy in front of mirror throws ball from right hand and catches with left hand. The direction of image of ball as seen from image of boy is:
  • Right hand to left hand
  • Left hand to Right Hand
  • Right hand to Right Hand
  • Left Hand to Left Hand
When the reflecting or refracting rays do not actually intersect but appear to intersect when produced backwards, 
  • a real image is formed
  • a virtual image is formed
  • either a real or a virtual image is formed
  • neither a real nor a virtual image is formed
Why is it difficult to read  image of a sentence from a book  in a plane mirror?
  • Due to lateral inversion
  • Due to scattering
  • Due to vertical inversion
  • Due to loss on reflection
Why is AMBULANCE written laterally inverted on an Ambulance van?
  • It gathers more attention since it is laterally inverted.
  • Vehicle in front sees a laterally inverted image and perceives it correctly, hence giving side to the ambulance van.
  • Vehicle in front sees a virtually erect image and perceives it correctly, hence giving side to the ambulance van.
  • None of the above.
An unlabeled analog clock is kept in front of mirror. Actual time on clock isWhat is time in the mirror image?
  • 3
  • 9
  • 6.15
  • 9.30
The image formed behind a mirror and a virtual image
  • are of same nature
  • are of different nature
  • are of same nature only in space
  • are of different nature only in space
Comparing real and virtual images, we may say that
  • Real images can not be obtained on a screen and virtual images can be
  • Virtual images can not be obtained on a screen and real images can be
  • Both real and virtual images can be obtained on a screen
  • Neither real nor virtual images can be obtained on a screen
A real image is formed by
  • actual intersection of the refracting or reflecting rays
  • imaginary intersection of the refracting or reflecting rays produced backwards
  • either actual or imaginary intersection of the reflecting or refracting rays
  • neither actual nor imaginary intersection of the reflecting or refracting rays
A virtual image is
  • always erect
  • either erect or inverted
  • always inverted
  • neither erect nor inverted
Which of the following is/are type(s) of reflection?
  • Regular reflection
  • Irregular reflection
  • Both
  • None
Fill in the blanks:
An image that cannot be obtained on a screen is called _________.
  • real
  • virtual
  • plane
  • none
From below given colors, which colour is not present in 7 colours of rainbow?
  • Violet
  • Purple
  • Green
  • Indigo
If a newton's color disc composed of seven colors is rotated at high speed, it appears as 
  • Seven coloured disc rotating
  • Few colours merge and only three dominant colours are visible
  • Colours mix and it appears white
  • Colours mix giving a sparkling effect
If the object is shifted by a distance towards the mirror, the image will shift by _______ towards the mirror.
  • Double the distance
  • Same distance
  • Half the distance
  • None of these
The silvering on the back surface of a mirror can be done by
  • Silver
  • Mercury
  • None
  • All kind of shiny materials
Magnifying glass forms
  • Real Image
  • Virtual Image
  • Both A and B
  • Neither A nor B
Choose the correct option
454590_4a5c965f70154fc48e2fb3d83a3f688d.png
  • A: Virtual Image

    B: Real Image
  • A: Real Image

    B: Virtual Image
  • A: Real Image

    B: Real Image
  • A: Virtual Image

    B: Virtual Image
$$A =$$?
$$B =$$?
456176.png
  • $$A = 2m, B = 7m$$
  • $$A = 7m, B = 5m$$
  • $$A = 3m, B = 6m$$
  • $$A = 2m, B = 5m$$
Choose the correct form of the image:
456178.png
  • None of these.
Virtual Image is always erect. Is statement True or False?
  • True
  • False
Newton's colour disc was invented by whom?
  • Albert Einstein
  • Sir Isaac Newton
  • Sir Isaac Newton and Faraday
  • Sir Isaac Newton and John Kennedy
When is the real image formed?
  • when the rays of light after reflection or refraction actually go away from some point
  • when the rays of light after reflection or refraction actually meet at some point
  • when the sun rays after reflection or refraction actually meet at some point
  • when the rays of light after deflection actually meet at some point
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