Refraction/Lenses

What is refraction? 

• The bending of light when it enters water or transparent material.  
• A type of lens 
• A type of matter. 

What is a lens?

• A type of matter than you cannot see through. 
• A transparent object that forms an image by refracting or bending  light. 
• A type of matter that you can kind of see through. 

Is a concave lens thicker or thinner in the middle? 

• Thicker 
• Thinner 

Is a convex lens thicker or thinner in the middle?

• Thicker 
• Thinner 

What kind of lens is a magnifying glass?

• Convex Lens
• Concave Lens

Complete this sentence: Concave lenses bend light rays ___________ from each other.

• Away

• Towards

As light travels from air to water to glass, it will refract. The best explanation for this would be

• Glass is less transparent than water, which is less transparent than air.

• Light will be transmitted into the new medium each time it reaches a boundary.

• A light wave reflects off molecules as it travels, this causes the light to bend.

• The speed of a wave slows as it travels at different speeds in different media.

What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common.

• They are opaque

• They refract light

• They reflect light

• That are translucent

Tags

NGSS.MS-PS4-2

A ____ lens is sometimes called a converging lens because it_____.

• convex; makes parallel light rays curve outward or diverge

• concave; makes parallel light rays travel at a faster speed than before they encountered the lens

• convex, makes parallel light rays passing through it bend inward and meet (converge) at a spot just beyond the lens known as the focal point.

• concave; makes parallel light rays passing through it bend inward and meet (converge) at a spot just beyond the lend known as the focal point.

Which image CORRECTLY shows how light behaves when it travels from air through glass?

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Tags

NGSS.MS-PS4-2