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- What are the lights that we get in the sunLOOK AT THE OBJECT. WHAT DO YOU SEE? WHAT DO YOU THINK ABOUT THAT? WHAT DO YOU WONDER ABOUT?While viewing an object under low power you see a small organism at the edge of the field of vision. You move to the high-power lens, but the organism is no longer visible. What has occurred? How do you correct it?
- When do you use a stereoscope? List one of its uses. What are the things that cannot be viewed by a stereoscope?What would be the consequences if birds and insects do not have structures which can disperse or refract light?A typical incandescent lightbulb emits approximately 3 x 1018 visible-light photons per second. Your eye, when it is fully dark adapted, can barely see the light from an incandescent lightbulb 10 km away. How many photons per second are incident at the image point on your retina? The diameter of a dark-adapted pupil is 6 mm.
- A man stares at a black clock on a white wall for several minutes. Thenhe shifts his view and looks at only the blank white wall. Although heis no longer looking at the clock, he sees a light clock against a darkbackground. Explain what is happeningWhat happen to the image distance in the eye when we increase the distance of an object from the eye?If an object appears red, which of the following light colors is transmitted or reflected (NOT absorbed)? Violet Red Green Blue Chartreuse