In a microscope, what does the objective do?
forms a virtual, enlarged image of the specimen
gathers light from a distant object to form a real image
forms a real, enlarged image of the specimen
gathers light from a distant object to form a virtual image
forms a real, enlarged image of the specimen.
Why doesn’t any light escape from the sides of an optical fiber?
because the angle of incidence is 180°
because the angle of incidence is so small
because the angle of incidence is 90°
because the angle of incidence is so large