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What best describes why the critical angle of an air-glass boundary is 39.3?
Wiki User
∙ 9y ago
The critical angle depends on the index of refraction of the two substances, in this case, air and glass. The angle can be calculated by Snell's Law. It won't always be exactly 39.3°, since different glasses have different indices of refraction.
Wiki User
∙ 9y ago
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What must be the critical angle if total internal reflection occured in diamond?
The critical angle is given by the formula: Thetac = sin-1(n2/n1) Assuming a diamond-air boundary, this gives the critical angle as: Thetac = sin-1(1.00/2.42) = 24.4 degrees.
What name is given to the angle where total internal reflection occurs?
Total internal reflection occurs when the angle of incidence with respect to the normal at the boundary to a less dense medium exceeds the critical angle.
How is the critical angle related to the refractive index of a medium?
The refractive number of a substance is a measure of how much the speed of a wave changes compared to the speed in a reference medium i.e. air or a vacuum. The critical angle is the angle of incidence above which total internal reflection occurs. When the angle of incidence of the light ray leaving the glass is less than the critical angle, the light ray speeds up on leaving the glass and is refracted away from the normal.
What is the critical angle of perspex and water?
The Critical angle of perspex is 42o.It is the same as the critical angle of glass.
A wave that travels along a boundary separating two mediums?
Very interesting query! Usually it is always possible to retrace the path of light. Suppose a light incident at angle 30 deg in rarer medium ie air it would go with an angle 19.5 deg in a glass medium whose refractive index is 1.5. Now if light traversing form glass incidents at an angle 19.5 deg then it would go refracted with angle of refraction 30 deg. If this is true then in case of ray traversing from denser into rarer at an angle of incidence equal to critical angle, the ray would go along the boundary as the angle of refraction becomes 90 deg. So if we retrace the ray going along the boundary of the two medium then the ray would bend into the denser medium making an angle equal to the value of critical angle with the normal drawn to the boundary line.
What happens to light when it strikes the boundary of the two media an angle equal to the critical angle?
It gets refracted so that its direction of propagation is the boundary line.
What must be the critical angle if total internal reflection occured in diamond?
The critical angle is given by the formula: Thetac = sin-1(n2/n1) Assuming a diamond-air boundary, this gives the critical angle as: Thetac = sin-1(1.00/2.42) = 24.4 degrees.
What name is given to the angle where total internal reflection occurs?
Total internal reflection occurs when the angle of incidence with respect to the normal at the boundary to a less dense medium exceeds the critical angle.
How is the critical angle related to the refractive index of a medium?
The refractive number of a substance is a measure of how much the speed of a wave changes compared to the speed in a reference medium i.e. air or a vacuum. The critical angle is the angle of incidence above which total internal reflection occurs. When the angle of incidence of the light ray leaving the glass is less than the critical angle, the light ray speeds up on leaving the glass and is refracted away from the normal.
What is the critical angle of perspex and water?
The Critical angle of perspex is 42o.It is the same as the critical angle of glass.
What is the definition of critical angle?
The definition of critical angle is the angle of incidence that refraction can still occur.
What the critical angle and is and what happens to light and the ceitical angle?
It spells "critical" correctly
A wave that travels along a boundary separating two mediums?
Very interesting query! Usually it is always possible to retrace the path of light. Suppose a light incident at angle 30 deg in rarer medium ie air it would go with an angle 19.5 deg in a glass medium whose refractive index is 1.5. Now if light traversing form glass incidents at an angle 19.5 deg then it would go refracted with angle of refraction 30 deg. If this is true then in case of ray traversing from denser into rarer at an angle of incidence equal to critical angle, the ray would go along the boundary as the angle of refraction becomes 90 deg. So if we retrace the ray going along the boundary of the two medium then the ray would bend into the denser medium making an angle equal to the value of critical angle with the normal drawn to the boundary line.
Define critical angle?
critical angle is defined as angle of incidence provide an anlge of refraction of 90 degree
Could you Explain the critical angle?
hi the critical angle is when the light comes in and it reflects
When do you have critical angle?
A critical angle refers to the highest angle the light can possibly refract into or between objects without disappearing. ie = light going from crystal into water, the critical angle is 47degrees.
Is critical angle fixed?
Yes for a given medium critical angle is fixed as mu = 1/ sin C mu is the refractive index of the material and C is the critical angle.
