Grade 8 Light and Optics Unit Review

A student placed a pencil in a cup of water.  The pencil appears broken because light-

• always travels in a straight line
• bends when it passes through water
• makes the water in the glass evaporate
• reflects the pencil on the water's surface

• Reflection
• Refraction

Which lens represents the path light takes through a diverging lens?

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• 
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• 

Which figure represents the path light takes through a converging lens?

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• 

Which optical device bends light inward?

• convex lens

• concave lens

• plane mirror

• convex mirror

A lens that is thicker in the middle than on the outside is called ___.

• diverging

• concave

• convex

• achromatic

A lens that is thinner in the middle than on the outside is called ___.

• diverging

• concave

• convex

• achromatic

Which technology CAPTURES and MAGNIFIES light?

• Telescope

• Microscope

• Camera

• All of them

Which optical technology do we use to observe small things?

• Telescope

• Microscope

• Camera

• ALL of them

Which technology do we use to observe FARAWAY objects?

• Telescope

• Microscope

• Camera

• All of them