telescope and microscope experiment

the convex lens is ....... lens

• converging

• diverging

the thin lens formula :

the magnification M=

if the image appears on the same side of the lens as the object , then

If the image is upright then M=

• +

• -

If the object plased closer to the lens than the focal length , the lens will produce ..................................

• a reduced real image

• a compared real image

• an enlarged real image

• an enlarged virtual image

If the object plased farther from a lens than the focal length , the lens will produce ..................................

• an inverted real image

• an inverted virtual image

• an upright real image

• an upright virtual image

the lens will produce an inverted real image If the object plased farther from a lens than the focal length and the image could be reduced or enlarged, depending how close the object is to the focal point.

the underline sentence is :

• false

• true

A ................: An optical device that use two lenses and it is used to view large objects that are at large distances from the lenses

• telescope

• microscope

A ................: An optical device that use two lenses and it is used to view small objects that are very close to the lenses

• telescope

• microscope