General Flashcards
(18 cards)
Light travels in…
Straight lines.
Light reflects off smooth, shiny, flat surfaces…
In a regular reflection pattern.
Light reflects off rough, shiny, uneven surfaces…
In a diffuse reflection pattern.
Light that is not reflected, is…
Absorbed.
As light passes through water, it…
Bends.
What are the 7 official colours of a rainbow?
Red, orange, yellow, green, blue, indigo and violet.
A light source is…
The place or object that light comes from.
What are the 2 types of light sources? Give examples.
Natural; A firefly.
Artificial; A lamp.
Does white light have colour?
Yes.
Does a light from a laser have to be reflected, before we can see it?
Yes.
Is light invisible, when it travels?
Yes.
Light can go through objects and can be still piped, but cannot…
Go around them.
What are some transparent objects?
Glass, plastic wrap and air.
What are some translucent objects?
Frosted glass, dirty water and waxed paper.
What are some opaque objects?
Aluminum foil, wood and cardboard.
What is a prism?
A transparent piece of glass that usually has 3 sides.
When does a shadow occur?
When an object blocks a light source, from reaching a certain area.
What is light?
Light is the form of radiant energy that stimulates the organs of sight, having normal human vision wavelength ranging from about 3900 to 7700 angstroms and traveling at a speed of about 300,000 km per second. One angstrom = 0.00000001 cm.
(Basically, light is a type of energy we can see.)
