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Light, Shadows and Reflection (Grade - 6)

Light Shadows and Reflection

16 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. An invisible energy that causes the sensation of vision is called light.
b. Shadows can be smaller or bigger than the opaque body.
c. The speed of light is 3 x 106 m per second.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 2 Multiple Choice (Single Answer)

Which of the following is not a characteristic of an image in a pinhole camera?

  1. Image in the pinhole camera is always smaller than the object.
  2. Image in the pinhole camera is always inverted.
  3. All colours are seen in the image in a pinhole camera.
  4. Image in a pinhole camera is not misleading.
  5. Image in a pinhole camera is a dark outline formed behind an opaque body.
Question 3 Multiple Choice (Single Answer)

Which of the following is not a heterogeneous medium?

  1. Air
  2. Fog
  3. Mist
  4. Smoke
  5. Vaccum
Question 4 Multiple Choice (Single Answer)

Which of the following is/are the primary source of natural light for Earth?

  1. Planets
  2. Asteroids
  3. Meteors
  4. Sun
  5. Moon
Question 5 Multiple Choice (Single Answer)

Which of the following is a translucent medium?

  1. Thin layer of water
  2. Alcohol
  3. Vacuum
  4. Oiled paper
  5. Benzene
Question 6 Multiple Choice (Single Answer)

Which of the following changes will take place in an image formed by pinhole camera if the tissue paper screen is moved towards the pinhole?

  1. Image will become bigger in size, less bright and erect.
  2. Image will become bigger in size, less bright and will remain inverted.
  3. Image will become bigger in size, somewhat more bright and will remain inverted.
  4. Image will become smaller in size, somewhat more bright and will remain inverted.
  5. Image will become smaller in size, less bright and will remain inverted.
Question 7 Multiple Choice (Single Answer)

A pinhole camera is a very simple device based on the principle of

  1. reflection of light
  2. refraction of light
  3. rectilinear propagation of light
  4. scattering of light
  5. None of these
Question 8 Multiple Choice (Single Answer)

Which of the following do not emit light in the darkness?

a. Glow worms
b. Fire flies
c. Bed bugs

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 9 Multiple Choice (Single Answer)

Which of the following is not a condition for the formation of a dark shadow?

a. There must be an opaque screen for receiving the shadow.
b. There must be a translucent body to obstruct the light.
c. There must be a source of light from where light must be coming.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 10 Multiple Choice (Single Answer)

Which of the following types of images will be formed if the pinhole in a pinhole camera becomes bigger?

  1. Image will be erect and blurred.
  2. Image will be inverted and sharp.
  3. Image will be erect and sharp.
  4. Image will be inverted and blurred.
  5. Image will be inverted, blurred, but bigger in size than the object.
Question 11 Multiple Choice (Single Answer)

Match the following:

 
a. Point source of light 1. It is the phenomenon due to which a beam of light bounces off from a smooth polished surface in some other direction.
b. Ray of light 2. It is the source of light which is of the size of the head of a common pin.
c. Reflection of light 3. It is the path along which light energy travels in a given direction.
  1. a – 3, b – 2, c – 1
  2. a – 1, b – 3, c – 2
  3. a – 1, b – 2, c – 3
  4. a – 2, b – 1, c – 3
  5. a – 2, b – 3, c – 1
Question 12 Multiple Choice (Single Answer)

A shadow is a dark patch formed behind an opaque body when it is placed in the path of light. Which of the following is not a characteristic of a shadow?

  1. The shape of the shadow may or may not match with that of the object.
  2. A shadow is a dark outline of the object.
  3. The size of the shadow increases if the opaque body is closer to the source of light and away from the screen.
  4. The size of the shadow decreases if the opaque body is closer to the screen and away from the source of light.
  5. Objects of same colour, but of different shapes form the same kind of shadow.
Question 13 Multiple Choice (Single Answer)

Match the following:

 
a. Luminous bodies 1. They are those bodies that do not emit light of their own, but reflect the light energy falling on them.
b. Non-luminous bodies 2. They are those bodies that do not allow the light energy to pass through them.
c. Opaque bodies 3. They are those bodies that emit light by themselves.
  1. a – 3, b – 2, c – 1
  2. a – 3, b – 1, c – 2
  3. a – 1, b – 3, c – 2
  4. a – 1, b – 2, c – 3
  5. a – 2, b – 1, c – 3
Question 14 Multiple Choice (Single Answer)

Which of the following is/are the characteristic(s) of an image in a pinhole camera?

  1. Image is inverted and enlarged.
  2. Image is inverted and diminished.
  3. Image is erect and diminished.
  4. Image is erect and enlarged.
  5. Image formed is erect and of the same size as the object.
Question 15 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. Planets reflect the light of the Sun falling on them.
b. A non-luminous body can be made a luminous body by cooling it.
c. Anything through which light energy can pass partially or wholly is called an optical medium.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 16 Multiple Choice (Single Answer)

Match the following:

 
a. Homogeneous medium 1. It is a medium that partially allows light energy to pass through it.
b. Heterogeneous medium 2. It is an optical medium that has different compositions at different points.
c. Translucent medium 3. It is an optical medium that has uniform composition throughout.
  1. a – 3, b – 2, c – 1
  2. a – 3, b – 1, c – 2
  3. a – 1, b – 3, c – 2
  4. a – 2, b – 3, c – 1
  5. a – 1, b – 2, c – 3
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