EP COSMIC PERSPECTIVE-MOD.MASTERING
EP COSMIC PERSPECTIVE-MOD.MASTERING
9th Edition
ISBN: 9780137453481
Author: Bennett
Publisher: SAVVAS L
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Chapter 6, Problem 2EAP

How does a camera record light? How are images affected by exposure time? What are pixels?

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You want to decrease the exposure time for a camera. To get a good exposure what else do you need to change and how should you change it? Explain.
4. Suppose that you use the lens from your third Investigation to collect solar light at a normal incidence (Sun is 150 x 10° km away and has diameter of 1.4 x 10° km). At what distance from the lens will the image of the Sun be located? What will be the diameter of the image? What will be the irradiance (power per unit area) in the image, if the Sun's irradiance at the sea level is I 2 500 W/m?.
Design an eye for a(n) using a concave spherical mirror such that the image of an object 1.0 m tall and 10 m away fully fills its 1.0-cm square photosensitive detector (which is movable for focusing purposes). Where should this detector be located with respect to the mirror? What should be the focal length of the mirror? Draw a ray diagram.

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EP COSMIC PERSPECTIVE-MOD.MASTERING

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