Question

Question:-

Is it possible for light ray to travel in this manner in any case through a glass slab? Why or why not? Full justification and explanation needed.

Class-10 Refraction
Only brainly stars or mods will answer otherwise will be reported.


#Practice-3

Answer 1

Answer:

it is not possible,,,

because, the refracted ray always try to choose it's best path (shortest distance) for traveling,,

&

more the angle of incidence causes lesser in the angle of refraction,, but! more the angle refraction does not cause lesser in the angle of incidence,,,

this is very practical to think about this question & the above statement

&

in this question,, their is bigger angle of incidence that leads to a very small angle of refraction,,, that leads to a diagram (above in the attachment)

hope it's helpful,,,,,,

this answer may be correct,,,

Explanation:

@—

$\huge \: op \: boy$

Answer 2

★ Solution :-

No, it is not possible for a light ray to travel in this manner in any case through a glass slab.

There are several reasons for this answer. Let's discuss them one - by - one.

>> Travel of Light ::

Actually according to the motion of light, light travels in a straight line any medium. But as given in the diagram, after getting refracted at the glass slab's surface, the ray of light is getting dispersed slowly towards left side irrespective of it's angle of refraction (r). We see that the angle of refraction decides the deviation of any light from it's real path. But here in comparison to the angle of refraction, the refracted ray is getting more shifted towards the left side than actual deviation. This means the lateral displacement will also become false in this case.

>> Refractive Index ::

We know that speed of light in any medium depends upon it's refractive index. This means speed of light is inversely proportional to the refractive index which means that more is the refractive index, less is the speed of light and less is the refractive index, more is the speed of light. Here we clearly know that glass slab has more refractive index than air. This means the speed of light in glass slab should be comparitively less than that of in air. This eventually means that the rrefracted ray should be more closer to the normal and thus angle of refraction (r) should be less than the angle of incidence (i). But here we can see that angle of refraction ≈ angle of incidence. Thus the condition and laws of refraction fail here.

>> Relationship between first Refraction and second Refraction ::

When the ray of light passes from the glass slab to the air for the second time from downward side, then there the angle of incidence becomes equal to angle of refraction of previous Refraction. And then the angle of refraction of second refraction becomes equal to the angle of incidence to the first refraction. But as shown here, clearly this condition doesn't satisfies.

Refer to the attachment for the correct diagram of this.

Thus it is not a possible condition.