Astronomy Set
is a microwave electromagnetic
yes
The normal temperature of the melting point o water ice is:
0 C which means 273 Kelvin
What is the speed of light
3 * 10^8 m/s = 300,000 km/sec
Visible wavelengths of electromagnetic radiation have a range of wavelengths of
400 to 700 nanometers
How to convert from Celcius to Kelvin?
Add + 273
Which object emits no radiation?
An object at temp of 0 Kelvin
Xrays and light
Are the same thing except Xrays have a shorter wavelength than light.
Radio waves travel through space at what speed
At the speed of light.
Pieces of metal are heated by varying amounts in a flame. What color is the hottest?
Blue
Who was the first person to suggest that light is an electromagnetic wave?
James Clerk Maxwell.
What temp scale is used in science?
Kelvin
Sequence of planets:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Who first proved that light is a wave?
Thomas Young
Choose the correct sequence of electromagnetic radiations, in order of increasing wavelengths
UV, visible, IR, radio (Ultraviolet, visible, infrared, radio)
The star Vega has a higher surface temp than the sun therefore
Vega emits more IR and more UV flux than the sun
The planet with its orbit closest to a circle in our planetary system is
Venus
In the full wavelength range of electromagnetic radiation, visible light occupies what proportion of the possible range?
a very narrow range.
The average density of the outer giant planets compared to that of liquid water is
about 1.2 times
A blackbody is
absorbs all radiation falling on it and reflects none
In its iteration with matter, light behaves
as both waves and particles, depending on on the type of iteration.
The hot dense gas existing in the Sun emits energy
at all wavelengths, with a peak at one particular wavelength (color)
the temperature of a gas cloud in space is directly related to
average SPEED of its atoms.
Why scientist use kelvin
because its a meaningful 0.
Visible light occupies which position in the whole electromagnetic spectrum
between infrared and ultraviolet
the average density of the massive Jovian planets is
close to the density of water
Violet light differs from red light in that violet light
has a shorter wavelength than red light.
IN the 1860's Maxwell derived a set of math equations that described electromagnetic waves that could have different wavelengths. These waves which include visible light, have since been shown to
have no wavelength limit, either short or long.
what is planet radiation?
infrared radiation
in comparing photons of different wavelengths, we find that the energy carried by a photon
is larger if the wavelength is shorter
At 0 temp, what condition holds
motion of atoms becomes the minimum possible (but not zero)
Kelvin 0 means
motions of atoms and molecules stop
The mass of a planet is determined primarily by what method?
observation of its gravitational influence on an orbiting moon.
Where and by what technique was helium first discovered?
on the Sun, from spectroscopy during a solar eclipse
which is not electromagnetic
seismic waves
Around 1670, Issac Newton performed a crucial experiment on the nature of light when he
showed that the colors make up white light are intrinsic, not produced by the glass through which the light passes.
The kelvin scale measures
temperature in Celsius-sized degrees above absolute zero.
In terms of wavelengths, gamma rays are
the shortest wavelength electromagnetic waves
In 1675 Romer measured the speed of light by...
timing eclipses of Jupiter's satellites, which appeared to occur later when Earth was farther from Jupiter.
Mean density is
total mass divided by volume
electromagnetic radiation waves in order
visible light, UV radiation, X rays, gamma rays
in a radiowave transmitter (radio TV) when the frequency of the signals is increased the
wavelength is decreased
