NCERT Class 6 Science Chapter 8 Light Shadows And Reflections Multiple Choice Questions

Light Shadows And Reflections Multiple Choice Questions

Question 1. Observe the picture given in the figure carefully.

A patch of light is obtained at B when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?

1. A wooden board
2. A glass sheet
3. A mirror
4. A sheet of white paper

Answer: 3. A mirror

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Question 2. Shadows may give us information regarding the

1. Size of the object
2. Surface
3. Shape of the object
4. Shape of the source

Answer: 3. Shape of the object

Question 3. The diagram shows a light source, an opaque object m and a screen

What will be the shape of the shadow on the screen?

Answer: 3

Question 4. Which of the following is not always necessary to 1 observe a shadow?

1. Sun
2. Screen
3. Source of light
4. Opaque object

Answer: 1. Sun

Question 5. Paheli observed the shadow of a tree at 8:00 AM, 12:00 noon and 3:00 PM. Which of the following statements is the closest to her observation about the shape and size of the shadow?

1. The shape of the shadow of the tree changes but the size remains the same.
2. The size of the shadow of the tree changes but the shape remains the same.
3. Both the size and shape of the shadow of the tree change.
4. Neither the shape nor the size of the shadow changes.

Answer: 3. Both the size and shape of the shadow of the tree change.

Question 6. Which of the following can never form a circular shadow?

1. A ball
2. A flat disc
3. A shoe box
4. An ice cream cone

Answer: 3. A shoe box

Question 7. A student observes a tree given in the figure through a pinhole camera. Which of the diagrams given in figures (1) to (4) depicts the image seen by her

Answer: 4

Question 8. Four students A, B, C and D looked through pipes of different shapes to see a candle flame 

Who will be able to see the candle flame?

1. 1
2. 2
3. 3
4. 4

Answer: 4. 4

Question 9. Two students while sitting across a table looked down True/False onto its top surface. They noticed that they could see their own and each other’s image. The table top is likely to be made of

1. Unpolished wood
2. Red stone
3. Glass sheet
4. Wood top covered with cloth

Answer: 3. Glass sheet

Question 10. The bouncing back of ray of light from the shining surface on which it was incident is known as

1. Refraction
2. Bending
3. Reflection
4. Dispersion

Answer: 3. Reflection

Question 11. Abha keeps a potted plant in front of a mirror

From which point, can Abha see the image of the plant in the mirror?

1. Point 1
2. Point 2
3. Point 3
4. Point 4

Answer: 3. Point 3

Question 12. Which of the following is a luminous object?

1. Chair
2. Book
3. Moon
4. Torch

Answer: 4. Torch

Question 13. Which of the following cannot give off its light?

1. Planet
2. Electric bulb
3. Torch
4. Sun

Answer: 1. Planet

Question 14. Sachin can see through the glass because the glass is

1. Transparent
2. Translucent
3. Opaque
4. Reflective

Answer: 1. Transparent

Question 15. Which of the following is always necessary to observe a shadow?

1. Screen
2. Opaque object
3. Source of light
4. All of the above

Answer: 4. All of the above

Question 16. There are mainly three types of objects, based on their properties. Are you able to look through a transparent object? Yes, you can. Because it has a property to pass the light through it. Objects that allow light to pass through them completely are known as transparent objects. Pure water, plane glass, air, etc., are examples of such objects. Can you look through a brick wall? Probably you cannot. Because brick walls cannot allow light to pass through them. Those objects which do not allow light to pass through them are known as opaque objects. Wall and wood are examples of such objects. The third type of object is one which partially allows light to pass through them. Such types of objects are known as translucent objects. Examples are tracing paper, bathroom window glass, butter paper, etc.
Answer:

1. Which of the following is an opaque object?

1. Glass
2. Cardboard
3. Air
4. Pure water

Answer: 2. Cardboard

2. A transparent object allows light to

1. Transmit completely
2. Bounce back
3. Partially pass
4. None of these

Answer: 1. Transmit completely

3. A butter paper is an example of

1. Translucent object
2. Transparent object
3. Luminous object
4. All of these

Answer: 1. Translucent object

Question 17. Kabir has four sheets made of different materials. He tries to see a burning candle through each of the four sheets.

The table shows Kablr’s findings:

1.  What can be concluded from Kabir’s activity?

1. Sheet 2 is made of a transparent material.
2. Sheet 4 is made of a translucent material.
3. Sheet 2 and Sheet 3 are made of opaque materials.
4. Sheet 1 and Sheet 4 are made of transparent materials.

Answer: 4. Sheet 1 and Sheet 4 are made of transparent materials.

2. Which of these should Kabir keep the same for the activity?

1. Size of the sheets
2. Size of the candle
3. Thickness of the sheets

Answer: 3. Thickness of the sheets

3. A burning candle emits light. Which of these objects can also emit light?

1. LED
2. Gold
3. Water
4. Mirror

Answer: 1. LED

4. Which of these works on the principle of reflection of light?

1. Television
2. Traffic signal
3. Periscope
4. Electric torch

Answer: 2. Traffic signal