explain the total internal reflection when light passes through different media . long answer
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ReflectionCritical angle
Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, total internal reflection takes place at the boundary between two transparent media when a ray of light in a medium of higher index of refraction approaches the other medium at an angle of incidence greater than the critical angle. For a water-air surface the critical angle is 48.5°. Because indices of refraction depend on wavelength, the critical angle (and hence the angle of total internal reflection) will vary slightly with wavelength and, therefore, with colour. At all angles less than the critical angle, both refraction and reflection occur in varying proportions.
When a ray of light emerges obliquely from glass into air, the angle of refraction between ray and normal…
Glass prisms can be shaped to produce total internal reflection and as such are employed in binoculars, periscopes, telescopes, and other optical instruments. Light rays may be conducted over long, twisting paths by multiple total internal reflection in glass or plastic rods or fibres.
Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, total internal reflection takes place at the boundary between two transparent media when a ray of light in a medium of higher index of refraction approaches the other medium at an angle of incidence greater than the critical angle. For a water-air surface the critical angle is 48.5°. Because indices of refraction depend on wavelength, the critical angle (and hence the angle of total internal reflection) will vary slightly with wavelength and, therefore, with colour. At all angles less than the critical angle, both refraction and reflection occur in varying proportions.
When a ray of light emerges obliquely from glass into air, the angle of refraction between ray and normal…
Glass prisms can be shaped to produce total internal reflection and as such are employed in binoculars, periscopes, telescopes, and other optical instruments. Light rays may be conducted over long, twisting paths by multiple total internal reflection in glass or plastic rods or fibres.
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Total Internal Reflection=>
=>As light goes from denser to rarer medium,it bends away from the normal.
When the angle of incidence is increase, angle of reflection is also increase.
=>Critical Angle (c):- The angled incidence for which the reflraction angle become 90° is also known Critical Angle.
it's know as ( TIR).
Condition:-
1). The ray should go from denser to rarer medium.
2). Angle of∆i is greater than∆c.
ACC. to Snell's Law:-
Sin i. 1
_____. = __
Sin r. u1 ( meo)
When i= c ,than r= 90°
Sin c 1 1
____ = __ Sin c = ___
Sin 90° u u
" c = Sin -1 ( 1/ u) "
I hope it's helpful to you please mark as a brain list plzzzzzzzzzz.
=>As light goes from denser to rarer medium,it bends away from the normal.
When the angle of incidence is increase, angle of reflection is also increase.
=>Critical Angle (c):- The angled incidence for which the reflraction angle become 90° is also known Critical Angle.
it's know as ( TIR).
Condition:-
1). The ray should go from denser to rarer medium.
2). Angle of∆i is greater than∆c.
ACC. to Snell's Law:-
Sin i. 1
_____. = __
Sin r. u1 ( meo)
When i= c ,than r= 90°
Sin c 1 1
____ = __ Sin c = ___
Sin 90° u u
" c = Sin -1 ( 1/ u) "
I hope it's helpful to you please mark as a brain list plzzzzzzzzzz.
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