Author Question: A pinhole cameras has no lens. The tiny pin-hole opening insures that rays of light from different ... (Read 90 times)

Pea0909berry · **on:** Jul 29, 2018

A pinhole cameras has no lens. The tiny pin-hole opening insures that rays of light from different parts of an object

1) overlap.
2) don't overlap.
3) bend to a focus.

Small openings between leaves in a tree act as pinholes. The round spots of light cast on the ground below are images of
4) the Sun.
5) the openings themselves.
6) both of these
7) neither of these

Question 2

Light passes readily through a pair of Polaroids when their axes are

1) parallel.
2) perpendicular.
3) neither of these,

and for a pair of Polaroids with axes at 45 degrees to each other
4) light will not pass.
5) light that passes is dimmer than for parallel Polaroids.
6) another Polaroid is necessary for any light to pass.