Optical Instruments

What can you use to see other planets?

• MIcroscope

• Telescope

• Camera

• Eye glass

Select the correct combination that is found in a refracting telescope.

• One convex lens and one plane mirror

• One convex lens and two plane mirrors

• Two convex lenses

• One convex lens and one concave lens

A Refracting telescope has an objective lense and

• an occular lens

• an eyepiece lens

• a side lens

• a mirror lens

The correct definition for Convex lens is ...

• an imaginary line drawn perpendicular to the surface of a mirror

• the point where light rays converge

• a lens that looks like the back of a spoon

• a transparent material that is thicker in the middle and thinner on the edges

Where does light get focused onto, in the eye?

• Cornea

• Pupil

• Retina

• Optic nerve

Identify the type of mirror that produces images that are similar to the images produced by convex lenses.

• Concave mirror

• Plane mirror

• Convex

• None of the above

Decide on the correct set of features to describe an image from a concave lens.

• Virtual, upright, smaller

• VIrtual, upright, larger

• Virtual, inverted, larger

• Virtual, inverted smaller

Use page 181 in your textbook to help you:

"The further the object is from a convex lens the ...."

• further the image distance to the lens

• the closer the image distance to the lens

• the image and object distance will be the same

• The focal length will change

A refracting telescope will be heavier than a reflecting telescope.

• True

• False

Microscopes have two convex lenses with short focal lengths.

• True

• False