What is the intensity of the radio waves

Reference no: EM13541446

A source of radio waves is emitted from the center point of our galaxy 1.9 x 104 light years away. Nine picowatts of power from these waves blanket the surface of the Earth facing the center point.

a) What is the intensity of the radio waves? (Take the diameter of the Earth to be 1.27 x 104 km.)
b) How much power do the radio waves carry?
c) How much power from these radio waves is received by the Greenbank radio telescope (GBT) assuming the radio dish is pointed towards the center of the galaxy? The GBT dish is 100 m in diameter. (This is approximately the minimum intensity wave that can be detected by the

Reference no: EM13541446

Questions Cloud

What is the intensity of the background radiation : In 1965 Arno Penzias and Robert Wilson discovered the cosmic background radiation (this is the radiation left over from the Big Bang!)

What is the intensity of the focused beam : A HeNe (Helium-Neon) laser has a beam power of 5.00 mW at a wavelength of 656 nm. Assume the beam is focused by a lens to a circular spot whose effective diameter is 15 wavelengths of the light.

Which direction is the wave propogating in : The electric field of a plane electromagnetic wave is given by: Ex = 0, Ey = 0, Ez = 2.0 cos [0.6? x 1015 (t – y/c)], with all quantities in SI units.

How far away is the crab nebula in kilometers : The Crab Nebula is a supernova remnant 6500 light years away from Earth. Records from the Chinese indicate that they observed this supernova to occur in the year 1054.

What is the intensity of the radio waves : A source of radio waves is emitted from the center point of our galaxy 1.9 x 104 light years away. Nine picowatts of power from these waves blanket the surface of the Earth facing the center point.

Neglect thickness of head : The place you get your hair cut has two nearly parallel mirrors 8.00apart. As you sit in the chair, your head is 2.50 from the nearer mirror. Looking toward this mirror, you first see your face and then, farther away, the back of your head. (The m..

The electric field intensity between two parallel plates : The electric field intensity between two parallel plates separated by 25mm is 8000 N/C. How much work is done by the electric field in moving a -2uC charge from the negative plate to the positive plate?

Calculate the force required to pull a copper ball of radius : Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force.

The density of air under standard laboratory conditions : The density of air under standard laboratory conditions is 1.29{\rm kg}/{\rm m}^{3} , and about 20.0\% of that air consists of oxygen. Typically, people breathe about .5 L of air per breath.

User Account

All Pages