MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Absolute and Relative Refractive Index

In an experim...

Question

In an experiment on tracing the path of a ray of light through a rectangular glass slab, four students A, B, C and D used the following values of the angle of incidence and the distance between the feet of the two pins (fixed on the incident rays):
(A) 30°, 45°, 60° and 1 cm
(B) 30°, 45°, 60° and 6 cm
(C) 20°, 50°, 80° and 10 cm
(D) 20°, 50°, 80° and 15 cm
Out of these, the best choice is that of the student:
(1) A
(2) B
(3) C
(4) D

Open in App

Solution

The best choice of angles of incidence would be 30°, 45°, and 60°, because it would be easier to perform the calculations to obtain the angle of refraction theoretically. Also, the best choice for the distance between the pins would be 6 cm, because it will provide a better line of sight for the observations through the other side of the slab.

Hence, the correct answer is option 2.

Suggest Corrections

thumbs-up

5

Similar questions

Q. In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students measured the angles of incidence (i), angles of refraction (r) and angles of emergence (e) as shown in the diagrams:

The correct measurement is given in the diagram:
(1) A
(2) B
(3) C
(4) D

Q. A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table.

The correct observation is

S. No.	Angle of incidence	Angle of refraction	Angle of emergence
A B C D	30° 40° 50° 60°	25° 42° 50° 60°	30° 40° 50° 62°

(1) A
(2) B
(3) C
(4) D

Q. While performing the experiment on tracing the path of a ray of light through a rectangular glass slab, in which of the following experimental setups, students likely to get the best results?

P_{1}

P_{2}

are the positions of pins fixed by him :

Q. A student suggested the following 'guidelines' to his friend for doing the experiment on tracing the path of a ray of light passing through a rectangular glass slab for three different angles of incidence:
A. Draw the 'outline' of the glass slab at three positions on the drawing sheet.
B. Draw 'normals' on the top side of these 'outlines' very near their left end.
C. Drawn the incident rays on the three 'outlines' in directions making angles of 30°, 45°, 60° with the normals drawn.
D. Fix two pins vertically on each of these incident rays at two points nearly 1 cm apart.
E. Look for the images of the 'heads' of these pins while fixing two pins from the other side, to get the refracted rays.

When he showed these 'guidelines' to his teacher, the teacher corrected and modified the 'guidelines' labelled as
(1) B, C, E
(2) B, D, E
(3) B, C, D
(4) C, D, E

Q.
A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:

(1) A
(2) B
(3) C
(4) D

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Refraction Through a Glass Slab and Refractive Index

PHYSICS

Watch in App

explore_more_icon

Explore more

Absolute and Relative Refractive Index

Standard X Physics

Join BYJU'S Learning Program

CrossIcon