Question
Can X-rays be used for photoelectric effect?

Answer

Yes, X-rays can be use for photoelectric effect. Photoelectric effect is the emission of electrons from a metal surface when the frequency of radiation is greater than the threshold frequency of the metal. For photoelectric effect using X-rays, the energy of the incoming X-ray photon should be greater than the work-function of the metal used.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Draw a plot showing the variation of photoelectric current with collector plate potential for two different frequencies, $ν_1 > ν_2,$ of incident radiation having the same intensity. In which case will the stopping potential be higher? Justify your answer.
Suppose the glass of the previous problem is covered by a jar and the air inside the jar is completely pumped out.
  1. What will be the answers to the problem?
  2. Show that the answers do not change if a glass of different shape is used provided the height, the bottom area and the volume are unchanged.
A river 400m wide is flowing at a rate of 2.0m/s. A boat is sailing at a velocity of 10m/s with respect to the water, in a direction perpendicular to the river.
  1. Find the time taken by the boat to reach the opposite bank.
  2. How far from the point directly opposite to the starting point does the boat reach the opposite bank?
A certain material has refractive indices 1.56, 1.60 and 1.68 for red, yellow and violet light respectively.
  1. Calculate the dispersive power.
  2. Find the angular dispersion produced by a thin prism of angle 6° made of this material.
  1. A screen is placed at a distance of 100 cm from an object. The image of the object is formed on the screen by a convex lens for two different locations of the lens separated by 20 cm. Calculate the focal length of the lens used.
  2. A converging lens is kept coaxially in contact with a diverging lens - both the lenses being of equal focal length. What is the focal length of the combination?
A wheel starting from rest is uniformly accelerated at $ 4\ rad/-s^2$ for 10 seconds.It is allowed to rotate uniformly for the next 10 seconds and is finally brought to rest in the next 10 seconds. Find the total angle rotated by the wheel.
  1. Calculate the equivalent resistance of the given electrical network between points A and B.
  2. Also calculate the current through CD and ACB, if a 10 V d.c. source is connected between A and B, and the value of R is assumed as 2 Ω.
A proton is projected with a velocity of $3 \times 10^6\ ms^{-1}$ perpendicular to a uniform magnetic field of 0.6T. Find the acceleration of the proton.
A capacitor of capacitance $100\mu\text{F}$ is connected to a battery of 20 volts for a long time and then disconnected from it. It is now connected across a long solenoid having 4000 turns per metre. It is found that the potential difference across the capacitor drops to 90% of its maximum value in 2.0 seconds. Estimate the average magnetic field produced at the centre of the solenofd during this period.
A charge Q is distributed uniformly over a metallic sphere of radius R. Obtain the expressions for the electric field (E) and electric potential (V) at a point 0 < x < R.
Show on a plot the variation of E and V with x for 0 < x < 2R.