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the denominator of the formula includes cosine of angle of refraction. If angle of refraction is 90 degrees then the denominator becomes zero and the lateral shift becomes infinity. Now the Question is when will the angle of refraction be 90 degrees? When light travels from denser medium to rarer medium, incidence is at critical angle then your question is possible.

Now, the above argument is for the lateral shift that cannot be determined.

When the angle of incidence is at 900, then the numerator becomes

'cos r' which is equal to the denominator. Hence L = t following the formula and this is the maximum measurable lateral shift

Hope this satisfies your doubt...

Q: For what angle of incidence the lateral shift produced by glass slab is maximum?

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When a ray of light from a medium is incident on another medium with different optical density, the ray bends due to refraction. The perpendicular distance between the emergent ray and the incident ray is called the lateral shift. The angle which the incident ray makes with the normal is called angle of incidence denoted by 'i' and the angle made by the refracted ray with the normal is called the angle of refraction denoted by 'r'. Lateral shift is given by the formula:- Where t is the thickness of the glass slab, i is the angle of incidence and r is the angle of refraction

Angle of incidence can be anything. Angle of reflection is the same as angle of incidence.

The second angle of incidence is equal to the angle of refractions.

no

when the angle of refraction is zero you still need an angle of incidence because it still reflects back.

Related questions

The angle of incidence

When a ray of light from a medium is incident on another medium with different optical density, the ray bends due to refraction. The perpendicular distance between the emergent ray and the incident ray is called the lateral shift. The angle which the incident ray makes with the normal is called angle of incidence denoted by 'i' and the angle made by the refracted ray with the normal is called the angle of refraction denoted by 'r'. Lateral shift is given by the formula:- Where t is the thickness of the glass slab, i is the angle of incidence and r is the angle of refraction

angle between two edges and angle of incidence how denser the object is

Angle of incidence can be anything. Angle of reflection is the same as angle of incidence.

The angle of incidence is ALWAYS equal to the angle of reflection! This is one of the laws of reflection.

The second angle of incidence is equal to the angle of refractions.

no

0(zero) Angle of incidence = angle of reflection

when the angle of refraction is zero you still need an angle of incidence because it still reflects back.

I can't find a sentence for the angle of incidence.

the angle of incidence is the initial ray angle and the angle of reflection is the reflected ray angle

The angle made by the incident ray with the normal is called the angle of incidence.