Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
42 Cards in this Set
- Front
- Back
does not let light pass through |
opaque |
|
clear; allows light to pass through |
transparent |
|
allows light to pass through, but scatters the light |
translucent |
|
able to produce its own light |
luminous |
|
the bouncing back of light |
reflection |
|
a two-sided piece of transparent material with one or both sides curved |
lens |
|
a lens that is thicker at the edges than in the middle, making things look smaller |
concave lens |
|
a lens that is thicker in the middle than at the edges, making things look larger |
covex lens |
|
to gather together in one place |
focus |
|
the bending of light rays as they enter a new material |
refraction |
|
a transparent object that separates the colors in white light by bending them at different angles |
prism |
|
the series of colored bands created when sunlight is separated |
spectrum |
|
invisible light beyond the red end of the spectrum; heats the object it strikes |
infrared light |
|
the light-sensitive lining at the back of the eyeball |
retina |
|
the opening in the iris through which light enters the eye |
pupil |
|
the colored part of the eye that surrounds the pupil and regulates its size |
iris |
|
the transparent, outer layer at the front of the eyeball |
cornea |
|
an extra layer of cells behind the retina of many nocturnal animals |
tapetum |
|
Light naturally travels around corners. T/F |
false |
|
Shadows are made when light is blocked by an object. T/F |
true |
|
Translucent materials allow you to see light but not objects through them. T/F |
true |
|
A microscope is used to make far away objects seem closer. T/F |
false |
|
A telescope is used to make small objects seem larger. T/F |
false |
|
Mirrors are used in periscopes to enable their users to see around corners. T/F |
true |
|
Nearsighted people need lenses that are convex. T/F |
false |
|
Ultraviolet light causes tanning or sunburn. T/F |
true |
|
Insects use their compound eyes to detect movement in any direction. T/F |
true |
|
An animal with binocular vision can see two images at the same time. T/F |
false |
|
Who is the Creator of all light? |
God |
|
What travels faster than anything else scientists can measure? |
light |
|
What is the speed of light? |
186,000 miles per second |
|
What do we call the luminous objects we see in God's creation? |
natural lights |
|
Why do leaves look green? |
They absorb all other colors in light and reflect green. |
|
What is the ability to do work? |
energy |
|
Which mirror focuses light rays, causing the reflected oject to look bigger? |
concave mirror |
|
Who invented the incandescent light bulb? |
Thomas Edison |
|
Who discovered tht white light is a mixture of colored light? |
Sir Isaac Newton |
|
Which mirror scatters light rays, causing the reflected object to look smaller? |
convex mirror |
|
Why do you see the flash of lightning before you hear the clap of thunder? |
because light travels faster than sound |
|
If you shine a flashlight into the night sky, how fast will its light travel? |
approximately 186,000 miles per second |
|
Why can you see a red-colored light coming from the heating element of an operating toaster? |
The element gives off light because it is very hot. |
|
Why can't you see your face in a chalkboard? |
The chalkboard is not a good reflector because it has a dull, rough surface. |