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PSCI Chapter 12 Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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PSCI Chapter 12 Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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PSCI Chapter 12 Exam | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
transmit & scatter light - translucent
a property of a material that indicates how much the speed of light in the material is reduced compared
to the speed of light in a vacuum - index of refraction
an image of a distant object produced by the refraction of light through air layers of different density. -
mirage
a transparent material that selectively transmits light - filter
a colored material that is used to change the color of other substances - pigment
only absorb and reflect light - opaque
transmits, but doesn't scatter light (you can see clearly through it) - transparent
Describe two ways you could direct light around a corner. - use mirrors to change light direction, use
glass, plastic or other clear substances to refract light around a corner
How would rubbing a mirror with sandpaper affects how the mirror reflects? - It would make the surface
rougher so it would produce a diffuse reflection.
What does an object's index of refraction indicate? - it indicates how much light will slow down in the
material compared to its speed in a vacuum
What happens to white light when it passes through a prism? - the white light get refracted at different
amounts because of its wavelength and get separated into a rainbow
, Is the lens of your eye, your finger-nail, your skin, and your tooth opaque, translucent, or transparent?
Explain. - lens is transparent because light passes through without scattering.
Fingernails and skin are translucent because light passes through them but you cannot see through
them.
Teeth are opaque because light doesn't pass through them.
A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the ray
make with normal? - 48°
A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the
normal? - 27°
Why does a white fence appear white? - White fences reflect all colors. Your eye sees three colors and
all three get activated. The brain interprets this as white light
What color would be seen if equal amounts of red light and green light were mixed? - yellow
Compare & contrast the primary colors or light and primary pigment colors. - Primary colors are red,
green, & blue.
Primary pigments are magenta, yellow, & cyan.
Equally mix primary colors and you get white.
Equally mix the primary pigments and you get black.
How do your eyes detect color? - Cones in your retina detect light of specific wave lengths, which your
brain detects as colors.
Red cones detect red & yellow light, green cones detect yellow and green light, blue cones detect blue &
violet light.
Light reflected from an object passes through a green filter, then a red filter, and finally a blue filter.
What color does the object appear to be? - black
In the human eye, there are about 120,000,000 rods. If 90,000,000 rods trigger at once, what percent of
the total number of rods are triggered? - 75%
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