Look at the diagram given below. It explains the working of a periscope. A periscope makes use of plane mirrors. A simple periscope can be used to see over obstacles such as walls. a) What is the nature of image formed when we see through a periscope? b) Give reason for the question asked in part ‘a’. c) Will the image be larger, smaller or of the same size as the object? Why?

a) The image formed in the periscope is a virtual image and erect. Light is always reflected from the mirrors which are present at the two edges of the periscope. Hence, the image formed in the periscope is not real it is virtual. b) As two plane mirrors are used in the periscope. These mirrors are fitted into each end of the tube at an angle of exactly at 45 ° , so that they face each other. The image formed will be upright, virtual, and same size. c) The size of the image is the same as the size of the object, as plane mirrors are used in periscope.

MEDIUM

6th CBSE

IMPORTANT

Earn 100

Draw a well-labelled ray diagram to explain the reflection of light through plane mirror. Explain the features of the image thus formed.

Important Questions on Light-Shadows and Reflection

EASY

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q C

Annu saw the shadow of her teddy in torchlight. She was surprised to see the shadows of different sizes of the same teddy. Observe the given pictures and help her to find the answers to her questions.

Question Image

How are shadows formed?

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q C

Question Image

Why does the shadow of the same teddy differ in sizes?

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q C

Question Image

Name the factors on which the shape and size of the shadows depend.

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q D

In a heavy rainfall, when thunder and lightning occur, we see light first and hear sound later. Why?

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q E

If light travels at a speed of

3, 00, 000 km

in one second and it takes

8

minutes to reach on the earth, calculate the distance from the earth to the sun.

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q E

At room temperature, the speed of sound in air is about

330 km

per second. How many times faster is the speed of light than sound?

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>EVALUATE>Q E

If a racing car travels at a speed of

100 km

per second, how long it would take to travel the distance between the Earth and the Sun?

MEDIUM

6th CBSE

IMPORTANT

Wow Science Hands-on Learning in Science 6>Chapter 4 - Light-Shadows and Reflection>WORKSHEET>Q A

Look at the diagram given below. It explains the working of a periscope. A periscope makes use of plane mirrors. A simple periscope can be used to see over obstacles such as walls.
Question Image

a) What is the nature of image formed when we see through a periscope?

b) Give reason for the question asked in part ‘a’.

c) Will the image be larger, smaller or of the same size as the object? Why?

Draw a well-labelled ray diagram to explain the reflection of light through plane mirror. Explain the features of the image thus formed.

Important Questions on Light-Shadows and Reflection

Learn and Prepare for any exam you want !