Light & EM spectrum Flashcards
Laws of reflection
Angle of incidence equals reflected ray
Total internal reflection
When the angle of incidence is greater than the critical angle the light is completely reflected within the block
Light wave from air into glass
Bends toward the normal
Light wave from glass to air
Bends away from the normal.
A blue filter
Transmits blue light and absorbs all other light colours
Converging shape
Oval shape
Diverging shape
Sqaushed rectangle vertical
Focal point of a converging lens will be in front or behind
Behind
Does converging lens produce real,virtual or both
Both
If the object is too close the rays will diverge forming virtual image that is the correct way up and in front of the object
Why do astronomers use different kinds of telescopes to study different wavelengths
Because different material affects EM waves depending on their wavelength eg gamma waves are absorbed by the atmosphere but some radio waves aren’t
EM spectrum order short wavelength to long wavelength
Gamma X Ray Ultraviolet Infrared Micro Radio
How are radio waves produced and detected
Produced by oscillations in electrical circuits . Absorbed by metal and cause oscillations in the electric circuits connected to the Ariel
Can microwaves be refracted in the earths atmosphere
No
Can radiowaves be refracted in the earths atmosphere
Yes at the right angle
Earths energy balance
The amount of energy received by the earth is the same as the amount emitted
