chpt 22

Why do we see lightning before we hear thunder?

Because lightning (light) travels faster than thunder (sound).

What is the difference between reflection and refraction of light?

Reflection is the bouncing of light off a surface, and refraction is the bending of light as it moves from one material to another.

In terms of the absorption and reflection of light, describe the difference between a black piece of cloth and a white piece of cloth

black is absorption and white reflects all colors of light

Which star would be hotter, a star that produces blue light or a star that produces red light?

blue

What are the three additive primary colors?

blue,green,red

what are 3 qualities of light?

intensity, high speed, color

Arrange the following in order of speed from fastest to slowest: sound waves, light waves, water waves.

light, sound, water

Which photoreceptors in your eye respond the most in dim evening light?

rods

What is white light in terms of other colors?

the combination of all colors.

What determines the color of an object?

the composition of the light on the object, how the object reflects light,the material of the object, how object absorbs light

Describe the role of atoms in producing light in a fluorescent light bulb.

use electricty which makes uv light and which later is converted to visible light

For stage lighting for a play in a theater, a magenta spot of light is created and a green spot of light. What happens when these two spots of light combine?

white light