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Science MCQ

T3 CH1 Light · Tamil Nadu Board STD 7 (Tamil - English Medium). 21 questions.

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21 questions · timed · auto-graded

MCQ 11 Mark
Sivarajan placed a meter stick in the playground at 7.00 am in the morning. How will the shadow of the stick at noon look in comparison to the one in the morning
  • A
    There will be no shadow
  • B
    The shadow will be longer and on the opposite side as the sun
  • C
    The shadow will be shorter and on the same side as the sun
  • ✓
    The shadow will be shorter
Answer
Correct option: D.
The shadow will be shorter
The shadow will be shorter
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MCQ 21 Mark
Which of the following is the best reflector of light?
  • A
    plastic plate
  • ✓
    plane mirror
  • C
    wall
  • D
    paper
Answer
Correct option: B.
plane mirror
plane mirror
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MCQ 31 Mark
Reflection occurs , when the light
  • A
    about to reach a surface
  • ✓
    approaches a surface
  • C
    passes through a surface
  • D
    None of these
Answer
Correct option: B.
approaches a surface
approaches a surface
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MCQ 41 Mark
Choose the translucent substance from the following
  • A
    glass
  • B
    wood
  • C
    water
  • ✓
    Clouds
Answer
Correct option: D.
Clouds
Clouds
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MCQ 61 Mark
______Surface reflects the light well.
  • A
    water
  • B
    compact disc
  • ✓
    mirror
  • D
    stone
Answer
Correct option: C.
mirror
mirror
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MCQ 71 Mark
Light that hits a mirror gets ______.
  • A
    Transmitted
  • ✓
    Reflected
  • C
    Absorbed
  • D
    Refracted
Answer
Correct option: B.
Reflected
Reflected
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MCQ 81 Mark
Which of the following facts explain how shadows are formed?
Light travels in straight lines
Opaque bodies do not allow light to pass through them
Reflection occurs at a smooth surfaces like mirrors
Lateral inversion happens
  • ✓
    both A and B
  • B
    both A and D
  • C
    both B and C
  • D
    only A
Answer
Correct option: A.
both A and B
both A and B
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MCQ 91 Mark
Light travels only in a______ It is because of this property that______ are formed.
  • A
    curved line, shadows
  • ✓
    straight line, shadows
  • C
    straight line, reflection
  • D
    curved line and then straight line, shadows
Answer
Correct option: B.
straight line, shadows
straight line, shadows
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MCQ 101 Mark
The image formed by a pinhole camera is inverted because,
  • ✓
    light travels in straight lines
  • B
    light rays become laterally inverted as they pass through a pinhole camera
  • C
    light rays pass through the pinhole
  • D
    light rays get reflected
Answer
Correct option: A.
light travels in straight lines
light travels in straight lines
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MCQ 111 Mark
A virtual image is
  • A
    always real
  • ✓
    always uncapturable on a screen
  • C
    always inverted
  • D
    always caught on a screen
Answer
Correct option: B.
always uncapturable on a screen
always uncapturable on a screen
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MCQ 121 Mark
Which one of the following is involved for the formation of rainbow in the sky?
  • A
    Expansion of light
  • B
    Expansion of heat by the Sun
  • C
    Distance between the Earth and the Moon
  • ✓
    Dispersion of light
Answer
Correct option: D.
Dispersion of light
Dispersion of light
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MCQ 131 Mark
If we mix lights of the colours of the rainbow we will get .
  • A
    pink light
  • B
    brown light
  • ✓
    colourless light
  • D
    black light
Answer
Correct option: C.
colourless light
colourless light
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MCQ 141 Mark
The image which can be obtained on screen is called ________
  • A
    erect
  • ✓
    real
  • C
    virtual
  • D
    inverted
Answer
Correct option: B.
real
real
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MCQ 151 Mark
White light is composed of ________
  • ✓
    seven colours
  • B
    five colours
  • C
    three colours
  • D
    only one colours
Answer
Correct option: A.
seven colours
seven colours
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MCQ 171 Mark
Plane mirrors are arranged parallel to each other to get ________
  • A
    a single image
  • ✓
    two images
  • C
    a large number of reflected image
  • D
    no image
Answer
Correct option: B.
two images
two images
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MCQ 181 Mark
Rectilinear propagation is ________
  • A
    mode of travelling in straight lines
  • B
    mode of travelling in curved lines
  • C
    ability to bend around obstacles
  • ✓
    displaying the phenomenon of diffraction
Answer
Correct option: D.
displaying the phenomenon of diffraction
mode of travelling in straight lines
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MCQ 191 Mark
Light shows ________
  • A
    curvilinear propagation
  • B
    random propagation
  • ✓
    rectilinear propagation
  • D
    none of these
Answer
Correct option: C.
rectilinear propagation
rectilinear propagation
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MCQ 201 Mark
Which of the following is a natural source of light?
  • A
    Electric lamp
  • B
    Electric filament
  • C
    Torch light
  • ✓
    Sunlight
Answer
Correct option: D.
Sunlight
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MCQ 211 Mark
You can see your image in polished floors, but not in wooden table because ______.
  • A
    regular reflection takes place in wooden table and irregular reflection in polished floor
  • B
    regular reflection takes place in polished floor and irregular reflection in wooden table
  • C
    regular reflection takes place in both polished floor and wooden table
  • D
    irregular reflection takes place in both polished floor and wooden table
Answer
You can see your image in polished floors, but not in wooden table because regular reflection takes place in polished floor and irregular reflection in wooden table.
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