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Refraction occurs when a wave bends as it crosses the boundary between different mediums (eg. air to glass). The wave bends because waves travel at different speeds in different mediums.
When a wave enters a more dense medium (eg. air to glass), the wave slows down, and bends towards the 'normal'.
When a wave enters a less dense medium (eg. glass to air), the wave speeds up, and bends away from the 'normal'.
* The normal is an imaginary line which is perpendicular to where the light is entering the new medium.
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What happens to some of the light before entering a glass block?
When light enters a glass block, it undergoes reflection and refraction. However at the glass air interface, refraction occurs to a larger extent than refraction and hence some of the light is reflected while the rest of it enters the glass block.
When does refraction happen?
Refraction occurs when light travels from one medium to another having different optical densities.
What has to be different to allow refraction to occur?
The density. Refraction occurs at the boundary between two media of differing densities, such as air and water.
Which of the following occurs when light is reflected from a rough or unpolished suaface?
Refraction.
Why does no refraction occurs when the media have the same index of refraction?
Reflection happens only at the interface between two media, and two media with the same index of refraction act as if they were a single medium. Thus, at the interface between media with the same index of refraction, there is no reflection, and the ray keeps going straight. Continuing this line of thought, it is not surprising that we observe very little reflection at an interface between media with similar indices of refraction.
What happens if the refraction angle is greater than ninety degrees?
This means no refraction occurs i.e. Total internal reflection (all light reflected) occurs
What happens to some of the light before entering a glass block?
When light enters a glass block, it undergoes reflection and refraction. However at the glass air interface, refraction occurs to a larger extent than refraction and hence some of the light is reflected while the rest of it enters the glass block.
Does refraction occur for both sound and light waves?
Refraction occurs for any waves, where there's a change in the medium.
When does refraction happen?
Refraction occurs when light travels from one medium to another having different optical densities.
If the angle of incidence increases and the indexes of refraction stay the same what happens to the angle of refraction?
The angle if refraction also increases.
What is the angle or refraction when the angle of incidence is 40degrees?
That depends on the substances where the refraction occurs. The relationship between the angles, and the index of refraction of both materials, is given by Snell's Law.
What happens when a light ray travels at right angles into a transparent object?
When light travels at right angles into a transparent object (i.e. angle of incidence is zero), no refraction occurs.
What has to be different to allow refraction to occur?
The density. Refraction occurs at the boundary between two media of differing densities, such as air and water.
Which of the following occurs when light is reflected from a rough or unpolished suaface?
Refraction.
Refraction occurs at a boundary between two mediums because?
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Reflection happens in concave mirrors?
in concave and convex mirrors refraction happens
What happens when seismic waves move from the Earth's crust to the mantle?
Refraction Happens
