write two precautions to be taken while tracing the path of a Ray of light passing through rectangular glass slab for different angles of incidence.
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Answered by
168
Precautions are :-
1. we should take drawing board , which is made of soft wood.
2. Make sure Glass of slab is clean and free from air bubbles .
3. The pin should be fixed on vertical position and all pins should be placed in straight line.
4. Angle of incidence should be lies between 30° to 60° .
5. Keep your eyes along line while absorbing the image , fixing the pins on the board.
1. we should take drawing board , which is made of soft wood.
2. Make sure Glass of slab is clean and free from air bubbles .
3. The pin should be fixed on vertical position and all pins should be placed in straight line.
4. Angle of incidence should be lies between 30° to 60° .
5. Keep your eyes along line while absorbing the image , fixing the pins on the board.
Answered by
45
(i) The glass slab should be perfectly rectangular with all its faces smooth.
(ii) While fixing the pins P1 and P2 or the pins P3 and P4, care should be taken to maintain a distance of about 5 cm between the two pins. This would help in tracing the direction of incident ray and that of emergent ray with greater accuracy.
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