Question

procedure of glass prism experiment class 11th ...no spams pls ❌❌❎​

Answer 1

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$\huge\text{\underline{Procedure..!!}}$


⚫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.


⚫Calculate the refractive index of the material of the prism using the formula.


$\text{\underline{Note:}}$

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