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6.2 Refraction
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What is the difference between reflection and refraction?
Reflection is when light bounces off a surface, while refraction is when light bends as it passes through a different medium.
How does refraction help magnifying glasses work?
The convex lens bends light to make objects appear larger.
What happens to light when it passes through a convex lens?
It bends inward and focuses to a point.
Why do objects under water appear closer than they really are?
Because light bends when it moves from water to air, making objects seem shifted.
How is refraction useful in eyeglasses?
Lenses bend light to help focus images correctly on the retina.
What causes optical illusions related to water?
Refraction, because light bends as it passes from air to water, making objects look different.
How do prisms use refraction to create rainbows?
They bend and split white light into different colors.
What is the focal point of a convex lens?
The point where refracted light rays meet.
How does a convex lens affect light rays?
It makes them converge (come together) at a focal point.
What is a medium in terms of light?
The material that light travels through, such as air, water, or glass.
What happens to light when it moves from water into air?
It speeds up and bends away from the normal.
What happens to light when it moves from air into water?
It slows down and bends towards the normal.
Give an example of refraction in everyday life.
A straw appearing bent in a glass of water.
Why does light refract when it enters a different medium?
Because light travels at different speeds in different materials.
What is refraction?
Refraction is when light changes direction as it passes from one medium to another.
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