Take a small mirror. Hold it in the bright sunlight that enters your room. Now, slowly move the mirror in a different direction.
Why does the path of light move with the movement of the mirror?
Important Questions on Physical Environment
After falling on the mirror, has the light gone back and reached the wall?
The angle of incidence =
The angle of reflection=
Observe the following experiment and answer the following question.
Your teacher has put on the laser torch and has held it towards the wall. A spot of light has been cast on the wall. Since your teacher has held the torch, the spot of light is shimmering on the wall. So the torch has to be placed on a table. Now the torch has come to rest. As a result of it, the light spot has also come to rest. Mark the light spot as A on the wall where it has been cast. After that, the glass block or the paperweight is placed in the path of the laser beam. Now the laser beam has passed through the glass and has fallen on the wall. Look at the wall and see whether the light spot is cast at A on the wall or not.
Now think why the light spot has changed its position. Has the light changed its path? Why does it do so? Think about it.
Observe the following experiment and answer the following question.
Your teacher has put on the laser torch and has held it towards the wall. A spot of light has been cast on the wall. Since your teacher has held the torch, the spot of light is shimmering on the wall. So the torch has to be placed on a table. Now the torch has come to rest. As a result of it, the light spot has also come to rest. Mark the light spot as A on the wall where it has been cast. After that, the glass block or the paperweight is placed in the path of the laser beam. Now the laser beam has passed through the glass and has fallen on the wall. Look at the wall and see whether the light spot is cast at A on the wall or not.
Now remove the glass block or the paperweight. What do you observe now? Does the light spot come back to its initial position? Is the glass blocks or the paperweight responsible for the above incident.
A torchlight is held in front of the mirror as shown in the picture.
Now put on the torchlight. Place your eyes along the path of propagation of the reflected ray of light. Now, look in a mirror. What do you observe? Does it seem that the light is coming from a torch that is kept in the mirror?
Stand beside a wide mirror. Look at your image formed in the mirror.
Is your height the same as that of your image?
Press a pen on the surface of the mirror.
Is the size of your pen and that of its image the same?
Go four steps back from the mirror. Now start to move slowly towards the mirror and watch your image carefully.
When you take a step does your image matches steps with you?
