What is the energy difference between the two states

Assignment Help Physics

Reference no: EM13313212

The ground (n=1) state of hydrogen atom is acutally 2 different quantum states with slightly different energies. Because of a magnetic interaction between the proton and electron, the quantum state where the proton and electron spins are aligned has an energy a few microelectronvolts above the energy of the state where the spins are anti-alligned.

A) If the hydrogen atoms undergoes a transition between these states, it emits a photon with a characteristic wavelength of 21 cm. (astronomers can detect such photons with a radio telescope and thus determine the distribution of hydrogen gas in the sky). What is the energy difference between the 2 states.

B) if a hydrgen cloud in intergalactive space has a temperature of about 2.9K (about equal to the temerature of the cosmic background radiation). about what fraction of hydrogen atoms in the N=1 level will be in the aligned state( and thus be capable of emitting the 21-cm photons)?

Reference no: EM13313212

Questions Cloud

Estimate of the impact of the program : State A implented a program to reduce smoking rates in 2005. State B did not. Using the data provided in the attached graph, calculate the difference-in-difference estimate of the impact of the program.

Find the smallest value for the angle : A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. Find the smallest value for the angle , such that the lower end of the board does not slide along the ground

How much will it cost for one 15 minute episode of heating : A room 4x5x6 meter is heated by a baseboard resistance heater. We want the heater to raise the room temperature from 7 to 23 deg C in 15 minutes. There are no heat losses from the room, and specific heat may be assumed constant.

Depict the structure of (e)-2,3,5-trimethyl-3-hexene : Draw the structure of (E)-2,3,5-trimethyl-3-hexene. Clearly show the proper (E) or (Z) stereochemistry about the double bond.

What is the energy difference between the two states : If the hydrogen atoms undergoes a transition between these states, it emits a photon with a characteristic wavelength of 21 cm. What is the energy difference between the 2 states

What is the volume of the solids in dry mass of specimen : The solids in a specimen have a specific gravity of 2.65. If the oven-dry mass of the specimen is 25kg, what is the volume of the solids in it

Determine the speed of each object : Two masses are connected by a light string passing over a light, frictionless pulley, Determine the speed of each object when the two pass each other

Calculate the degree of saturation and dry density : Soil has been compacted in an earth dam to a bulk density of 2.2 Mg/m3 and a water content of 9.5%. The value of Gs is 2.6. Would it be possible to compact the above soil at a water content of 13.5% to a dry density of 2.00 Mg/m3

Explain what is the limiting reagent and percent yield : the resulting acid dichloride is reacted with 20mL butyl amine (density=0.74 g/mL). After work up and recrystallization, 12.5 g of N,N'-dibutyl adipamide is obtained. What is the limiting reagent and percent yield

User Account

All Pages