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What is the critical angle for light traveling from water into air?
Wiki User
∙ 13y ago
48.6 degrees
Wiki User
∙ 13y ago
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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.
A ray of light traveling from air to water is incident at an angle of 64 degrees Part of the light is reflected at an angle of what?
It is reflected at exactly the same angle, but on the other side of the normal at the point of incidence.
A diver shines light up to the surface of a smooth pond at a 10 degree angle some light passes into the air above and the part that reflects back into the water makes an angle of how many degrees?
10
What describes the angle between water level and the incline of a water ski ramp?
An acute angle
How does the angle of refraction compare to the angle of incidence measured from the normal when going from air to water?
Angle of refraction will be less compared to the angle of incidence in this case.
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.
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 ray of light traveling from air to water is incident at an angle of 64 degrees Part of the light is reflected at an angle of what?
It is reflected at exactly the same angle, but on the other side of the normal at the point of incidence.
Why critical angle for water is greater than the critical angle of glass?
Because of the difference in the density of the materials.
Does water reflect or refract and why?
Both.Water is transparent to visible light but the speed of light in water is different to the speed of light in air. As a result, light rays travelling from air to water are usually refracted. However, as is the case at any interface between transparent media, light rays which hit the surface of the water at an angle greater than the critical angle are reflected.
What is the critical angle of glass?
When light in glass of index of refraction n hits the surface at angle A relative to the surface normal (perpendicular line to the surface) it generally exits into the air at larger angle B. These three variables are related by Snell's Law: n Sin(A) = (1)Sin(B) (air has index of refraction approx. = 1 ) The critical angle A for internal reflection occurs when the exit angle is 90 so the exit light skims the surface. Anything larger then critical A and the light gets reflected back into the glass. So in Snell's law let B = 90; nSin(A) =(1)Sin(90) = (1)(1) so Sin(A) = 1/n For glass n ~ 1.5 so Sin(A) ~ .67 This is the sine of the critical angle. Now figure out what angle has a sign of .67 and Whala you have it.
Is light bent towards or away from the medium in water?
Light bends towards the denser medium. If the light passes at an angle from air into water the angle will increase. An object underwater will appear closer to you than it actually is when you look down into the water at an angle.
The path of a light ray from glass into water?
Depends on the angle the light ray hits the water.
Can you see the evening sun while your head is under water?
If the angle of the sun relative to the surface of the water is less than 48.6 degrees you will not see the sun because the light will be reflected from the surface because that is the critical angle. The evening sun is lower than 48.6 degrees so it cannot be seen.This was the textbook answer. In reality, the ripples on the surface of even relatively calm water will make it impossible to maintain that perfectly flat surface condition so you will see the sun as the angle of incidence occasionally exceeds that critical angle as the light strikes the ripples or waves.For extra credit, you can explain that you can see the sun perfectly fine if you are holding a cup of water over your head.
A ray of light strikes a flat surface of water Part of the light will be reflected and part of the ray will enter the water The angle that is made by the part of the ray that enters the water with?
incident
Why a regular object bends in water?
Water's particles are denser than air's, so when the light enters water, the light rays slow down, so travel at a shallower angle to the angle at which the light enters (incidence).
A ray of light strikes a flat surface of water The angle that the incoming light ray makes with the normal is called the angle of?
incident
