The video tutorial explains how magnifying glasses work by demonstrating the principles of light refraction and magnification. It begins with an introduction to magnifying glasses and their effect on vision. The tutorial then delves into the basics of light refraction, showing how light changes direction when passing through different materials. It further explores how curved surfaces, like those of a magnifying glass, alter light paths to create focal points. Finally, the video illustrates the magnification process, explaining how light from an object is spread over a larger area, making the object appear bigger.

What does a magnifying glass do to the appearance of your eye?

• Makes it look bigger

• Makes it look smaller

• Changes its color

• Makes it disappear

What happens to light when it enters materials like air, water, or glass?

• It disappears

• It slows down

• It speeds up

• It changes color

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What happens to light beams when they enter a tilted piece of plastic?

• They speed up

• They change direction

• They stop

• They become invisible

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How do light beams behave when they pass through a piece of plastic with straight sides?

• They scatter

• They bend

• They disappear

• They come out straight

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What is the effect of a curved surface on light beams?

• It makes them disappear

• It changes their direction

• It speeds them up

• It changes their color

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What is the focal plane?

• A point where light beams scatter

• A point where light beams come together

• A point where light beams disappear

• A point where light beams change color

What happens to the light from your eye when it passes through a magnifying glass?

• It gets magnified

• It disappears

• It gets smaller

• It changes color

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NGSS.MS-PS4-2

Why does each beam of light change direction differently when passing through a curved surface?

• Because the light is weak

• Because the light is strong

• Because the surface is curved

• Because the surface is flat

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