we will go through activity 16.5 class 8 science chapter 16 Light. In this activity 16.5, we will discuss image formation by two plane mirrors placed at different angles touching their edges.. You should also go through activity 16.4 to get more about reflection.
Activity
· Take
two plane mirrors.
· Set
them at right angles to each other with their edges touching.
· To
hinge them you can use adhesive tape.
· Place
a coin in between the mirrors.
· How
many images of the coin do you see?
· Now
hinge the mirrors using the adhesive tape at different angles, say 45°, 60°,
120°, 180°, etc.
· Place
some object (say a candle) in between them.
· Note
down the number of images of the object in each case.
· Finally,
set the two mirrors parallel to each other.
· Find out how many images of a candle placed between
them are formed.
 |
| Activity 16.5 Class 8 Science Chapter 16 Solution |
Observation and explanation
When two plane mirrors are placed at right angles with
their edge touching and a coin is placed between two mirrors, we get four images.
Now mirrors are hinged at different angles and we get
images of the coin.
|
S.No. |
Angles between two
mirrors |
Numbers of
images |
|
1 |
30° |
12 |
|
2 |
45° |
8 |
|
3 |
60° |
6 |
|
4 |
120° |
3 |
|
5 |
180° |
2 |
When two plane mirrors are placed parallel and a
candle is placed between them, we get infinite images.
Conclusion
We can get different numbers of images when an object
is placed between two plane mirrors placed at different angles.
Related Topics
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