Mirrors & Lenses

The concave spherical mirror of radius r shown above has focal point F and center of curvature C. An object is placed at a distance 2r from the mirror. Where will the image be formed?

• Between C and the object

• To the right of the object

• Between F and the mirror

• To the left of the mirror

• Between F and C

An object is placed in front of a converging thin lens at a distance from the center of the lens equal to half the focal length. Compared to the object, the image is

• upright and smaller

• inverted and smaller

• upright and larger

• inverted and the same size

• inverted and larger

Tags

NGSS.HS-PS4-3

A student uses a convex lens to create images and collects the data shown above. The focal length of the lens is in which of the following ranges?

• 0–5 cm

• 5-10 cm

• 10-15 cm

• 15-25 cm

If light has a speed v in water, what would be its speed in diamond?

• v/2.42

• 2.42 v

• (1.33/2.42) v

• 1.33 v

• (2.42/1.33) v

Tags

NGSS.HS-PS4-1

When an object is placed on the focal point in front of a convex lens, the image produced is ___.

• real, reduced, and inverted
• real, enlarged, and inverted
• real, true, and inverted
• There is no image

When an object is placed between the focal point and the convex lens, the image produced is ___.

• real, reduced, and inverted
• real, enlarged, and inverted
• virtual, enlarged, and upright
• virtual, reduced, and upright

A diverging lens is also known as a ____lens.

• refracted
• diffracted
• convex
• concave

Is a convex lens thicker or thinner in the middle?

• Thicker 
• Thinner 

What type of image is formed when rays of light actually intersect?

• real
• virtual
• projected
• curved

Is a concave lens thicker or thinner in the middle? 

• Thicker 
• Thinner