Refraction and Lenses

A candle is placed on the principal axis of a convex lens at a distance of 30 cm from the lens. The focal length of the lens is 10 cm. The image formed will be

• Real, inverted, and reduced
• Real, inverted, and enlarged
• Real, upright, and enlarged
• Virtual, upright, and enlarged

A converging lens has a focal length of 30 cm. A 5 cm tall candle is placed at a distance of 10 cm in front of the lens. Determine the image distance.

• - 45 cm
• -30 cm
• -15 cm
• 6 cm

A converging lens has a focal length of 30 cm. A 5 cm tall candle is placed at a distance of 10 cm in front of the lens. Determine the image distance.

• - 45 cm
• -30 cm
• -15 cm
• 6 cm

An object is located 15 m from a converging lens with focal length 10 m.If the object is 2 cm tall, find the image height if the image is located at 30 m.

• 4 m
• -4m
• 1m
• -1m

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

• real
• virtual
• projected
• curved

A convex lens has a focal length f.  If an object is placed at 2f at what distance will the image appear?

• 2f
• f
• between f and 2f
• infinity

This image is.....

• inverted and smaller
• inverted and larger
• not inverted and smaller
• not inverted and larger

This image is...

• Inverted and smaller
• inverted and bigger
• not inverted and smaller
• not inverted and bigger

An incident ray that is parallel to the principal axis...

• will reflect parallel to the principal axis
• will refract through the focal point
• will reflect through the center of curvature
• will continue along the same path through the lens

a real image...

• is produced by virtual rays and can be projected on a screen
• is produced by real rays and cannot be projected on a screen
• is produced by virtual images and cannot be projected on a screen
• is produced by real rays and can be projected on a screen