Concave Lenses

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 are thick in the middle and thin in the edges.

• TRUE

• FALSE

The above lens is a type of ___.

• diverging lens

• converging lens

• divergent lens

• convergent lens

Tags

NGSS.MS-PS4-2

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

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• 
• 
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Tags

NGSS.MS-PS4-2

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 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 of the following describes a possible application of this type of lens?

• Concave lenses can be used in mirrors to make objects appear closer than they truly are.

• Concave lenses can be used in laser pointers to converge the projected light to a single point.

• Concave lenses can be used in microscopes to make small objects appear larger.

• Concave lenses can be used in car headlights to spread the projected light outwards.

Which of these describes a concave lens?

• focuses light

• breaks light down into bands of color

• spreads light out

• reflects light

A student is building a model of a lens that will spread light over the biggest space. Which best describes the type of model the student should make?

• The student should make a convex lens model because it breaks light down into bands of color.

• The student should make a concave lens model because it breaks light down into bands of color.

• The student should make a convex lens model because it directs light away from the center of the lens.

• The student should make a concave lens model because it directs light away from the center of the lens.