NCERT Class VI Science Solutions: Chapter 11 – Light Shadows and Reflections Part 2

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Question 4:

Which of the following is/are not always necessary to observe a shadow?

  1. Sun

  2. Screen

  3. Source of light

  4. Opaque object

Answer: A

Question 5:

Paheli observed the shadow of a tree at 8:00 a.m., 12:00 noon and 3:00 p.m. Which of the following statements is 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: C

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: C

Image of shoe box.

Image of Shoe Box.

Image of shoe box.

Question 7:

Two students while sitting across a table looked down on to 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: C

Question 8:

You have 3 opaque strips with very small holes of different shapes as shown in Fig. If you obtain an image of the sun on a wall through these holes, will the image formed by these holes be the same or different?

Result for 3 opaque strips

3 Opaque Strips

Result for 3 opaque strips

Answer:

The image obtained will be the same in all the three cases.

Question 9:

Observe the picture given in Fig. A sheet of some material is placed at position ‘p’, still the patch of light is obtained on the screen. What is the type of material of this sheet?

Result for Observe the picture given

Observe the Picture Given

Result for Observe the picture given

Answer:

A sheet of transparent material is placed at ‘P’.

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