Convex and Concave

Rob wants to design a solar furnace that will focus sunlight at one spot to heat water.

Which of the following mirrors should Rob use in the solar furnace?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

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Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Miranda wants to design a powerful flashlight and needs a mirror that will reflect light from the flashlight bulb in one direction.

Which of the following mirrors should Miranda use in the flashlight?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

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Tags

NGSS.MS-ETS1-1

Sarah has built a microscope but needs to design a mirror to illuminate her slides by focussing light from a distant bulb on the instrument.

Which of the following mirrors should Sarah use in the microscope?

Note: The smooth side is the reflecting part of the mirror, and the dotted side is the back.

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Tags

NGSS.MS-ETS1-1

NGSS.MS-PS4-2

How does a concave lens differ from a convex lens?

• A convex lens is another way to describe a plane mirror; a concave lens is curved

• A concave lens is curved inward on both sides; a convex lens is on only one side

• A convex lens has a thick center and thin edges, a concave lens has a thin center and thicker edges

• A convex lens has a thin center and thick edges. a concave lens has a thick center and thinner edges

Concave lenses, like the ones found in the peepholes of a door, always produce images that are .....

• Virtual, upright, smaller

• Real, inverted, larger

• Real, inverted, smaller

• Virtual, upright, larger

Is a concave lens thicker or thinner in the middle? 

• Thicker 

• Thinner 

A concave lens has an inward curved shape. It refracts light outward from the lens. They light rays spread apart as they exit the lens. Which represents a concave lens?

• A

• B

• A and B

• neither A or B

A student is creating a model of a concave lens. The diagram shows her incomplete model. Which action would best complete her model?

• The student should draw the light moving into the lens and then exiting in converging lines.

• The student should draw the rays of light moving into the lens and then exiting at right angles.

• The student should draw the rays of light moving into the lens and then exiting in a straight path.

• The student should draw the light moving into the lens and then exiting in lines that are spreading out.

Tags

NGSS.MS-PS4-2

Which model shows what happens when light passes through a convex lens?

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Tags

NGSS.MS-PS4-2

A mirror used by dentist in magnifying the area behind your teeth to check on cavities and tooth decay.

• concave

• convex

Tags

NGSS.MS-PS4-2