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Which is denser or heavier, a piece of glass or water?
Why do glasses help correct vision?
Eyeglasses have lenses that refract light in different ways.
How does a magnifying glass make things look different?
It looks larger
Through which of these two transparent materials, glass or water, will light travel faster?
water
How do convex lenses change the way things look?
When you look through a convex lens, an object will look larger and closer. It looks magnified because the light rays are closer together.
How do scientists use convex lenses?
They use microscopes and telescopes, both of which make objects appear larger and/or closer.
What happens when light hits a shiny object?
The light is reflected
How does the speed of light moving from air to water cause the straw to look bent?
Light slows down as it moves from air to water. As the light enters the water, it changes angle direction because it slows down.
How are concave lenses used for security?
Security cameras provide a wider view of a place and a peephole in a door allows a person to see who is at the door before opening it
Why does light travel through air faster than water?
Air is a gas and is less dense than water, which is a liquid.
How does a concave lens change the way things look?
A concave lens refracts and spreads light rays apart. If you look through a concave lens, an object will look smaller
Why are concave lenses used in peepholes?
Concave lenses spread out light rays and make items appear smaller so you can see more of the person outside your door.