Question

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Answer 1

Answer:

1-a

2-c

3-b

4-a

5-b

Explanation:

a=360°÷45=8

Answer 2

Solutions :-

1) Two plane mirrors are inclined to each other

Then,

Both the mirror are making angle of 45°

Now,

By using formula to find the number of images formed .

( 360 / N ) - 1

Put the required values in the formula,

(360° / 45° ) - 1

8 - 1

= 7

Hence, The number of images formed are = 7

2) Two plane mirrors are inclined to each other

Then,

Both the mirror are making angle of 60°

Now,

By using formula to find the number of images formed by mirror

( 360 / N ) - 1

Put the required values in the formula,

(360° / 60° ) - 1

= 6 - 1

= 5

Hence, The number of images formed by the mirror = 5

3) Two plane mirrors are inclined to each other

Then,

Both the mirror are making angle of 120°

Now,

By using formula to find the number of images formed by mirror

( 360 / N ) - 1

Put the required values in the formula,

( 360°/ 120° ) - 1

= 3 - 1

= 2

Hence, The number of images formed by the mirror = 2

4) The two adjacent sides of a room we made up of mirrors .

As we know that,

The angles formed by adjacent sides of room is 90°

Now,

By using formula to find the number of images formed by mirror

(360° / N) - 1

(360° / 90° ) - 1

= 4 - 1

= 3

Hence, The number of images formed by the mirror = 3

5) The two adjacent sides of a room we made up of mirrors .

As we know that,

The angles formed by adjacent sides of room is 90°

Now,

By using formula to find the number of images formed by mirror

(360° / N) - 1

(360° / 90° ) - 1

= 4 - 1

= 3

Thus,

The number of images formed by two adjacent sides of mirrors = 3

Now,

We have the floor of the room as a mirror

Therefore,

It only forms the image of the object to the mirror in the floor

Thus,

The number of images formed by floor

= 1

Now,

The total number of images formed = 3 + 1 = 4 $.$