0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

X-rays are produced in an X-ray tube operating at a given accelerating voltage.The wavelength of continuous X-ray has values from
  1. 0 to λmin where λmin>0
  2. 0 to
  3. 0 to λmax where λmax<
  4. λmin to λmax , where λmin>0 and λmax<

A
0 to λmin where λmin>0
B
λmin to λmax , where λmin>0 and λmax<
C
0 to
D
0 to λmax where λmax<
Solution
Verified by Toppr

In an x-ray tube, electrons are accelerated in a vacuum by an electric field and shot into a piece of metal called the "target". X-rays are emitted as the electrons slow down (decelerate) in the metal. The output spectrum consists of a continuous spectrum of X-rays, with additional sharp peaks at certain energies (see graph on right). The spectrum has a sharp cutoff at low wavelength (high frequency), which is due to the limited energy of the incoming electrons. For example, if each electron in the tube is accelerated through 60 kV, then it will acquire a kinetic energy of 60 keV, and when it strikes the target it can create X-ray photons with energy of at most 60 keV, by conservation of energy. (This upper limit corresponds to the electron coming to a stop by emitting just one X-ray photon.

Was this answer helpful?
0
Similar Questions
Q1
X-rays are produced in an X-ray tube operating at a given accelerating voltage.The wavelength of continuous X-ray has values from
View Solution
Q2
An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-rays in the spectrum, the variation of logλmin with log V is correctly represented in
View Solution
Q3
In a Coolidge tube
A) The intensity of x-rays is controlled by filament current
B) The intensity of x-rays is controlled by the accelerating voltage.
C) As the accelerating voltage is increased λmin is decreased
D) λmin is controlled by filament current
View Solution
Q4
X-rays are produced in X-ray tube operating at a given accelerating voltage. The wavelength of the continuous X-rays has values from
View Solution
Q5
Draw a labelled graph showing variation of relative intensity of X-rays versus their wavelength λ. Mark λmin on the graph
View Solution