Light Flashcards
does light need a medium to travel?
no, it does not need a medium.
Whats a period
how long it takes a wave to go through its full range of motion once.
Whats a periodic motion
A periodic motion is the waves repeated movement at regular intervals
The period of a wave is 0.5 sec, what’s the frequency?
2 waves/second
You throw a rock into a lake and see there was 3 waves in a second. Whats the period?
0.33 seconds
What are colours made of?
frequency of waves
Lowest frequency colour?
red
Highest frequency colour?
Purple
What is the visible spectrum?
Frequencies that lets one see colour.
We see green on leaves how is that so?
This is because the leave is absorbing every other colour coming from the light source and reflecting the green light the most.
Whats transmission?
When light goes through an object
Whats absorption?
When light is transformed into heat inside the object
Whats reflection?
When light bounces off an object
Explain transparent with an example.
Transparent is when nearly all of the light passes through an object. a window
define translucent with an example.
Allowing only some light to pass through. Tissue paper
