colours of light
what do you get when you mix red and blue
Purple
Is white light A colour or a combination of colours
It is a combination of colours
Distant from one crest To the next crest
Wave length
What waves do we surf on
Ocean waves
It takes light ___ seconds to get from earth to the moon
1.38
What are the three primary colours
Red, yellow, and blue
If you wear black will you feel warmer or colder
Warmer
the Top point of a wave is the
Crest
What do we use to see bones
X-rays
Light travels at
300,000 Km/s
How is the ocean blue
It reflects the blue light
does White light reflect or absorb all colours
Reflects all colours
What’s the bottom point of a wave
Trough
Ultraviolet waves have a ___ wavelength and the ____ Frequency
shorter wavelength + higest frequency
When were gamma rays discovered
1900
How are green apples green
The Apple absorb green light and the green light reflects
Does black light reflect or absorb all colours
Absorbs all colours
Height of a wave crest from its rest position
Amplitude
What wave uses radiation therapy
Gamma rays
When were cellphones invented
1973
Are blue birds really blue
No their feathers actually brown and grey
Where does white light come from
it Comes from red yellow and blue the primary colours wich make up the rainbow
Not all ____ need a medium
Waves
Electro magnetic radiation is…..
A form of energy
When was the first microwave invented
October 8, 1945