Reflection and refraction using prism experiment with aim, and procedure
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Aim:- Refraction through a Prism
Materials required:
Glass prism
Drawing board
Paper
Pins
Scale
Pencil
Protractor
Real Lab Procedure:
A paper is fixed on the drawing board placed on the table.
Place the given glass prism on the center of the paper.
Using the pencil, mark the outline ABC of the prism on the paper.
Remove the prism, and using the scale and pencil, normal N1O is drawn to the face AB at the point L.
Using the protractor, measure an angle 30° from the normal.
Another line KL is drawn at L making the angle 30° (angle of incidence i) with the normal N1O.
Two pins R1 and R2 are fixed on this line.
The prism is replaced on the outline ABC.
Viewing the pins from the face AC of the prism, two other pins R3 and R4 are fixed so that R1, R2, R3 and R4 are in a line.
Remove the pins.
A line NM is drawn to meet on the face AC through the marks of R3 and R4.
The line LM is joined.
The line KL is extended to get the LQ and NM is extended to get the line MP. These two lines meet at P.
Using the protractor, measure the angle QPM. This is the angle of deviation d.
Repeat the experiment for different values of angle of incidence (i) and the corresponding angle of deviations are measured.
Draw a graph with angle of incidence (i) along the X-axis and angle of deviation (d) along the Y – axis.
The angle of deviation corresponding to the lowest bend of the curve is the angle of minimum deviation (D).
Angle of the prism A is directly measured from the outline of the prism using the protractor.
Materials required:
Glass prism
Drawing board
Paper
Pins
Scale
Pencil
Protractor
Real Lab Procedure:
A paper is fixed on the drawing board placed on the table.
Place the given glass prism on the center of the paper.
Using the pencil, mark the outline ABC of the prism on the paper.
Remove the prism, and using the scale and pencil, normal N1O is drawn to the face AB at the point L.
Using the protractor, measure an angle 30° from the normal.
Another line KL is drawn at L making the angle 30° (angle of incidence i) with the normal N1O.
Two pins R1 and R2 are fixed on this line.
The prism is replaced on the outline ABC.
Viewing the pins from the face AC of the prism, two other pins R3 and R4 are fixed so that R1, R2, R3 and R4 are in a line.
Remove the pins.
A line NM is drawn to meet on the face AC through the marks of R3 and R4.
The line LM is joined.
The line KL is extended to get the LQ and NM is extended to get the line MP. These two lines meet at P.
Using the protractor, measure the angle QPM. This is the angle of deviation d.
Repeat the experiment for different values of angle of incidence (i) and the corresponding angle of deviations are measured.
Draw a graph with angle of incidence (i) along the X-axis and angle of deviation (d) along the Y – axis.
The angle of deviation corresponding to the lowest bend of the curve is the angle of minimum deviation (D).
Angle of the prism A is directly measured from the outline of the prism using the protractor.
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