light Flashcards
What is luminous
Something that gives out light
Why is the sun luminous
Because it emits light
What is translucent
Some light able to pass through
What is opaque
No light able to pass through
How much light is absorbed when it travels through glass
a small amount
Is it true that light travels in straight lines
yes
What is it called when light travels through a completely empty space
a vacuum
What happens when you look at an object
you look at an object, a source of light emits light, the light reflects off the object into your eye, then you see the object when the light is absorbed in your eye
What do opaque materials produce
shadows
Why can you predict the size and shape of shadows
because light travels in straight lines
What does light travel as
a wave
How long does it take from light to get to the earth from the sun
about eight minutes
What is a light-year
the distance light travels in one year
What is a light-minute
the distance light travels in one minute
Is light time a measure of distance or time
distance
