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Astronomy | Astrophysics
I know that light travels amzing distances, but eventually doesn't the particles have to disappear or die down? I don't believe they are strong enough to travel forever. This is bugging me extremely Thanks Justin
Astronomy | Astrophysics
12. An atom at rest emits light at 500nm. What is the observed wavelength if it is moving away from the observer at 10,000 km/sec?
3. What is the energy of a photon of = 600 nm, and in what region of the spectrum does it lie?
2. What is the frequency of an electromagnetic wave of wavelength 0.2 m? In what part of the spectrum is the wave?
3. What is the energy of a photon of = 600 nm, and in what region of the spectrum does it lie?
2. What is the frequency of an electromagnetic wave of wavelength 0.2 m? In what part of the spectrum is the wave?
Astronomy | Astrophysics
Hi,
Assume the intensity of a UV radiation field is J = 1.0 * 10^-19 ergs.cm^-1.s^-1.Hz^-1.Sr^-1.
I would like to know the value of J in unit of ergs.cm^-1.s^-1.A^-1.Sr^-1, where A indicates
Angstrom.
I would like to thank you in advance for your help.
With best regards,
Hassan
Assume the intensity of a UV radiation field is J = 1.0 * 10^-19 ergs.cm^-1.s^-1.Hz^-1.Sr^-1.
I would like to know the value of J in unit of ergs.cm^-1.s^-1.A^-1.Sr^-1, where A indicates
Angstrom.
I would like to thank you in advance for your help.
With best regards,
Hassan
Astronomy | Astrophysics
The rings of Saturn are composed of chunks of ice that orbit the planet. The inner radius of the rings is 73,000 km, while the outer radius is 170,000 km. Find the period of an orbiting chunk of ice at the inner radius and the period of a chunk at the outer radius. Compare your numbers with Saturn’s mean rotation period of 10 hours and 39 minutes. The mass of Saturn is 5.69 x 1026 kg.
Astronomy | Astrophysics
Two things, masses of 2000000000000000kg and 4500000000000000000kg distance between them is 400km then tell which point's value is 0 between them?
Astronomy | Astrophysics
Are there any stars in the sky that are not members of a constellation?
Astronomy | Astrophysics
Why can’t a person in Australia use the Big Dipper to find north?
Astronomy | Astrophysics
The Earth and other planets go around the sun in what kind of orbits?
Astronomy | Astrophysics
1 if I have a cup of water in the space station will the water floats out of the cup or not ? why?
2 if I put a piece of iron in water in space station will it sink due to density ?
2 if I put a piece of iron in water in space station will it sink due to density ?
Astronomy | Astrophysics
I'm watching "Horizon's How big is the Universe?". They said the observable universe is 46bn light years to the edge (they showed a sphere with a radius from the centre as they said it) so I assume they'd mean from the centre to any part of the edge. But if the universe is 13.9bn light years old and nothing goes faster than light... How can it be that big? Surely the max diameter is approx 28bn? Thanks!
