Concave and Convex Lens

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

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?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-2

Is a concave lens thicker or thinner in the middle? 

• Thicker 

• Thinner 

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.

The bending of light waves, or refraction, as they enter a new medium is caused by a change of

• speed

• frequency

• wavelength

The above lens is a type of ___.

• diverging lens

• converging lens

• divergent mirror

• convergent mirror

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

• converging

• concave

• convex

• achromatic

The point where the rays meet is known as....

• Fire

• the focal point

• refraction

• Plane of the lens