X-rays Physics - X-rays

One of the following wavelengths is absent and the rest are present in the X-rays coming from a Coolidge tube. Which one is the absent wavelength?

1. 25pm
2. 50pm
3. 75pm
4. 100pm

The figure shows the intensity-wavelength relations of X-rays coming from two different Coolidge tubes. The solid curve represents the relation for the tube A in which the potential difference between the target and the filament is V_A and the atomic number of the target material is Z_A. These quantities are V_B and Z_B for the other tube. Then:

1. V_A > V_B, Z_A > Z_B
2. V_A > V_B, Z_A < Z_B
3. V_A < V_B, Z_A > Z_B
4. V_A > V_B, Z_A < Z_B

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If the current in the circuit for heating the filament is increased, the cutoff wavelength:

1. Will increase.
2. Will decrease.
3. Will remain unchanged.
4. Will change.

The X-ray coming from a Coolidge tube has a cutoff wavelength of 80pm. Find the kinetic energy of the electrons hitting the target.

Can X-rays be polarized?

Can a hydrogen atom emit characteristic X-rays?

When 40kV is applied across an X-ray tube, X-ray is obtained with a maximum frequency of 9.7 × 10¹⁸Hz. Calculate the value of Planck constant from these data.

The distance between the cathode (filament) and the target in an X-ray tube is 1.5m. If the cutoff wavelength is 30pm, find the electric field between the cathode and the target.

Find the maximum potential difference which may be applied across an X-ray tube with tungsten target without emitting any characteristic K or L X-ray. The energy levels of the tungsten atom with an electron knocked out are as follows.

Cell containing vacancy	K	L	M
Energy in keV	69.5	11.3	2.3

Heat at the rate of 200W is produced in an X-ray tube operating at 20kV. Find the current in the circuit. Assume that only a small fraction of the kinetic energy of electrons is converted into X-rays.

If the operating potential in an X-ray tube is increased by 1%, by what percentage does the cutoff wavelength decrease?

Suppose a monochromatic X-ray beam of wavelength 100pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40cm away from the slit. What should be the separation between the slits so that the successive maxima on the screen are separated by a distance of 0.1mm?

In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?

Find the energy, the frequency and the momentum of an X-ray photon of wavelength 0.10nm.

The electron beam in a colour TV is accelerated through 32kV and then strikes the screen. What is the wavelength of the most energetic X-ray photon?

The short-wavelength limit shifts by 26pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage?

An X-ray tube operates at 40kV. Suppose the electron converts 70% of its energy into a photon at each collision. Find the lowest there wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides.