Question

in an experiment with a rectangular glass slab,a student observed that a ray of light incident at an angle of 55degree with the normal on one face of the slab ,after refraction strikes the opposite face of the slab before emerging out into air making an angle of 40degree with the normal .Draw a labelled diagram to show the path of this ray.What value would you assign in to the angle of refraction and angle of emergence



answer this soon guys​

Answer 1

Answer:

• Angle of incidence = 55°
• Angle of refraction before the refracted ray emerges out = 40°

Diagram attached.

As, the angle of incidence is always equal to angle of emergence.

Hence, angle of emergence = e = 55°.

Also, the r2 = 40°.

So, r1 will also be 40°.

EXPERIMENT RELATED TO GLASS SLAB –

Materials Required -

• Pins
• Drawing board
• White sheet
• Rectangular glass slab
• Protactor
• Scale
• Pencil

Procedure -

1. Fix the white sheet on the drawing board with pins.
2. Put the glass slab on the sheet.
3. Trace out the boundary of the glass slab.
4. Draw a perpendicular line on the glass slab - as a normal.
5. Draw whichever angle you want from the normal with the help of protactor.
6. Place the glass slab back on its place on the white sheet.
7. See through it to find the incident ray from the other side of the slab.
8. Set the pins on the other side of the slab in the line through where the incident ray can be seen.
9. Remove the slab and the pins.
10. Join the points formed by the pins to make a line.
11. Join the points that touches the glass slab to form the refracted ray.
12. The angle formed as the angle of emergence, if measured, will be equal to the angle of incidence.

Answer 2

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QUESTION -

In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of 55 ° with the normal on one face of the slab ,after refraction strikes the opposite face of the slab before emerging out into air making an angle of 40degree with the normal .

Draw a labelled diagram to show the path of this ray.

What value would you assign in to the angle of refraction and angle of emergence .

SOLUTION :

See the above attachment...

The above attachment shows the ray diagram labelled correspondingly.

Now, we have to find the value of the angle of refraction and the angle is emergence.

From the above Question, we can get the following information

..

In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of 55 ° with the normal on one face of the slab ,after refraction strikes the opposite face of the slab before emerging out into air making an angle of 40degree with the normal .

So,

Angle Of Incidence = 55 ° with the normal.

Angle Of Emergence = Angle of Incidence as the ray formed

after emerging, is found parallel incident ray.

So,

Angle Of Emergence = 55°

ADDITIONAL INFORMATION -

In the question, we are given :

after refraction strikes the opposite face of the slab before emerging out into air making an angle of 40 ° with the normal .

Here, the given angle given is that of the angle of reflection.

So,

First angle it's reflection = Second angle of reflection = 40°

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