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chapter 9 and 10
science for mr.spinka
Question | Answer |
---|---|
material that reflects light that strikes it? | opaque |
complemnetary colors are what? | any 2 colors combined |
the transparent part of the eye is? | the cornea |
a near sighted person can see? | near objects claerly and far away objects blurry. |
2 colors that combine to form a secondary color are called | complementary color |
electromagnetic waves ... | consist of electric and magnetic fields. |
polarizing filters indicate that light? | sometimes travels in waves. |
rainbows form because... | different wavelengths refract by diffrent amounts. |
a __________________ light bulb uses a filament | incandescent |
how long does it take for light from the sun to get to earth? | 8 minutes |
which of the following can be sensed by humans? | infared |
one application for ultraviolet rays is.... | killing bacteria |
___________ images are upside right | virtual |
the ______________ is how much a ray bends | index of refraction |
rods are cells that... | distinguish black and white. |
a cell phone transmits signals using? | high frequency radio waves |
electromagnetic waves travel at the same speed but have diffrent | frequencies |
most of the energy produced by incandescent light is given off as ? | heat |
fireflies produce light called | bioluminescence |
an infared camera takes a picture called a | thermogram |
micro waves are good for heating food because? | microwaves heat food quickly |
to send a t.v signal across the country networks can use ? | communication satellite. |
a plane mirror has a ? | flat surface |
optic fibers carry light across long distances because? | light travels paralles to the surface of the fiber |