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The angle of refraction is zero in Newton's ring experiment because the incident light is perpendicular to the plane of the glass plate, so refraction does not occur. This allows for constructive interference between the incident and reflected light waves, leading to the formation of interference rings.
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Why is it necessary for the angle of refraction to be equal to the angle of incidence when the angle of incidence is zero?
When the angle of incidence is zero, it indicates that the incident ray is perpendicular to the surface. In this case, the angle of refraction needs to be zero as well in order to maintain the direction of the light without any deviation. This ensures that the light continues to travel in a straight line as it passes through the interface between the two mediums.
Is the angle of incidence the same as angle of refraction?
No, the angle of incidence is the angle between the incident ray and the normal line, while the angle of refraction is the angle between the refracted ray and the normal line. In general, these angles are not the same, except in the case of normal incidence where they are both zero.
Why perpendicular light rays don't refrect through a medium?
Perpendicular light rays do not refract when entering a new medium because they do not change their direction when passing through the boundary between the two mediums. This is because the angle of incidence is 0 degrees, making the angle of refraction 0 degrees as well. Since the light ray continues along the normal line, there is no bending of the light ray.
For what angle of incidence the lateral shift produced by glass slab is maximum?
The lateral shift produced by a glass slab is maximum when the angle of incidence is equal to the critical angle of the glass-air interface. This critical angle is defined as the angle of incidence that produces an angle of refraction of 90 degrees within the glass, resulting in total internal reflection.
Why does light that is normal to a refracting surface not get refracted?
Light that is normal (perpendicular) to a refracting surface does not experience refraction because it does not change mediums when passing through the surface. Refraction occurs when light travels through a medium with a different optical density, causing it to change speed and direction.
