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Glass does cause disperssion. Think of a prism.
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∙ 14y ago
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Why does light refract when it passes from air into a glass slab?
Because glass slab is optically denser than air.
Why does not a glass slab disperse light?
The refractive index of prism is very high but its very low in glass slab, in glass slab the dispersion occurs but its very less, so is not visible.
Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself?
The glass slab is rectangular and both sides of the glass slab have the same medium. The light refracts in such a way that incident and emergent rays are parallel.
When a thick glass slab is placed over some printed matter the letters appear raised when viewed through the glass slab. Why?
When we keep the glass slab over some printed matter, the light coming from the letters (after reflection ) face change of medium at glass-air interface. Since glass has more refractive index than air, the light bends away from the normal as it goes out of glass. This apparently causes us to see the letters raised. Hope this clarified your doubt.
When light travels from air into a glass slab there is no change in its?
direction
Why does dispersion take place in only a prism and not in a glass slab?
The light strikes on one surface of the prism undergoes refraction and passes through the glass of the prism, and when emerges out, it refracts again. This causes the dispersion of the light and splits the light into its constituent colours. The degree of bending depends on the angle at which the ray of light enters and leaves the faces of the prism. The faces of the prism are not parallel to each other. For a glass slab, the opposite faces of the slab are parallel. So only a slight deviation occurs.
What will happen when ray of light passes through a glass slab?
speed of light will decreases
Why does light refact when it passes from air into a glass slab?
When light passes into the slab it is changing medium from less to more dense. When that happens the light slows down and bends towards from the normal
What is glass slab?
it is a substance made of glass having 3 dimensions and is cuboid shaped. It does not deviate the light. This means that the incident and the emergent ray are parallel. The slab only produces lateral (sideways) shift or displacement.
Why glass ionomer cement not mixed on glass slab?
GIC has silicate 'GLASS' in it's powder and so while mixing on glass slab the polyacrylic acid attack the glass content of glass slab. This may even alter properties of GIC.
What happens if light is passed through a glass slab whose sides are not parallel?
it becomes kinda prism
Why there is no dispersion of light refracted through a rectangular glass slab?
A prism breaks up white light into the light spectrum that shows each different color. However, a rectangle does not have the edges needed to break the light up.
