हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

Can X-rays Be Used for Photoelectric Effect? - Physics

Advertisements
Advertisements

प्रश्न

Can X-rays be used for photoelectric effect?

टिप्पणी लिखिए
Advertisements

उत्तर

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.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 22: X-rays - Short Answers [पृष्ठ ३९३]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
अध्याय 22 X-rays
Short Answers | Q 3 | पृष्ठ ३९३

संबंधित प्रश्न

Identify the part of the electromagnetic spectrum which is:

produced by bombarding a metal target by high speed electrons.


What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?


State an additional use of the X-rays waves


What is the range of the wavelength of the following electromagnetic waves?

(a) Visible. 


Give one use of microwaves.


X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?


Can a hydrogen atom emit characteristic X-rays?


The X-ray beam emerging from an X-ray tube


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


The Kα X-rays of aluminium (Z = 13) and zinc (Z = 30) have wavelengths 887 pm and 146 pm respectively. Use Moseley's  law √v = a(− b) to find the wavelengths of the Kα X-ray of iron (Z = 26).

(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)


Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40 cm 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 0.1 mm?


Name the scientist who discovered Microwaves 


To which regions of the electromagnetic spectrum do the following wavelengths belong: 
(a) 250 nm 
(b) 1500 nm 


Define the term "Intensity" in the photon picture of electromagnetic radiation. 


Name the radiation of the electromagnetic spectrum which is used for the following:

For taking photographs of the sky during the night and foggy conditions . Give the frequency range


Answer briefly.

Why light waves travel in a vacuum whereas sound waves cannot?


Solve the numerical problem.

Calculate the frequency in MHz of a radio wave of wavelength 250 m. Remember that the speed of all EM waves in a vacuum is 3.0 × 108 m/s.


Identify the part of the electromagnetic spectrum which:

  1. produces the heating effect.
  2. is absorbed by the ozone layer in the atmosphere.
  3. is used for studying crystal structure.

Write any one method of the production of each of the above radiations.


Name one radiation having the wavelength longer than the wavelength of these radiations.


What is the wavelength range of electromagnetic radiation used in radio broadcast?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×