electromagnets
How does electromagnetic energy travel?
In waves
In what medium does light move the fastest?
Gas / vacuum
Through what medium does sound move fastest?
solids
what color actually is the sun?
it is white
what is the black part of the eye called?
pupil
What is one way to destroy an electromagnet?
heating, inductive action by another magnet, or a hammer
can light bend around corners?
Yes it can, through a process called diffraction
can sound waves generate heat
yes
is the sky actually blue?
yes, our eyes make it appear blue.
what is the white part of the eye?
the sclera
How strong is a ferromagnetic material?
Depends on the magnet used with the ferromagnet
What happens to light when it gets refracted?
It will slightly change direction, like when going into water
How does sound travel through solids?
It vibrates the molecules, allowing the sound through
why is the sky blue?
blue light is scattered more than the other colors because it travels as shorter, smaller waves
How many parts is the eye made up of?
7 parts
Electromagnets are used in MRI machines. (true or false)
True
can humans ever directly see a photon?
Yes, photons are the only things humans see as it is just a bit of light
Does sound travel faster in space?
No, it can't travel at all
why do sunsets appear red?
The shorter wavelength blue light is scattered further, as the sunlight passes over a greater distance, and we see the longer wavelength yellow and red light.
what part of the eye is the most sensitive?
a part of the retina called the macula
What type of wave is an electromagnetic wave? (longitudinal or transverse)
Transverse wave
how long does it take to start a fire with a magnifying glass?
it can take from 20-30 seconds
Does sound travel faster in water or air?
Air, because it has much more molecules to bump into
why do rainbows appear?
the sunlight hits rain drops, the light is reflected, and each is reflected at a different angle, and the spectrum is separated producing a rainbow.
why are eyes related to physics?
Eyes convert traveling electromagnetic waves (light) into electro-chemical signals which the brain then processes into an image