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# 10 Examples of Compton Effect Questions and Answers

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Compton Effect Example Questions and Answers – Compton scattering is a process in which photon particles and electron particles bounce off each other. it doesn’t matter if we interpret the particles as virtual photons and virtual electrons. we can say that (1) the electron emits a photon, then scatters the incoming photon and (2) the incoming photon is produced from the annihilation of the electron-positron to form an outgoing photon.

Here’s the team chemistry.com has summarized examples of Compton Essay Effects and their Solutions for Class 12 High School Students from various book publishers, totaling 10 items so that students can learn how to count questions related to sub-materials from The Theory of Relativity.

## 1 – 5 Compton Effect Questions and Discussion

1. A single crystal of table salt (NaCl) is irradiated with an X-ray beam of wavelength 0.250 nm, and the first Bragg reflection is observed at an angle of 26.3°C. What is the distance between atoms for NaCl?

Discussion:

2. In the earlier chapter on the particle nature of electromagnetic radiation, we discussed three early experiments that led to quantum theory and proved its validity. What does the quantum theory prove? Explain !

#### Discussion:

The three quantum theories prove that light, which has been treated as a wave phenomenon, also has properties that we usually associate with particles.

The energy is not spread evenly on the wavefront, but is released in the form of particle-like bundles; a discrete (quantum) bundle of electromagnetic energy called a photon.

3. At what wavelength does an object at room temperature (T = 20°C) emit maximum thermal radiation?

Discussion:

By converting to absolute temperature, T = 293 K, then from the Wien displacement law we get:

4. At what temperature should we heat an object so that the peak of its thermal radiation is in the red spectrum region? If the room temperature of the object is known to be 20°C?

Solution:

5. Mention two important properties of thermal radiation!

Discussion

• The total radiant intensity over all wavelengths is directly proportional to the temperature T to the fourth power, because the total intensity is nothing but the area under the radiant intensity curves.
• The wavelength at which each curve reaches its maximum value, which we call max, decreases as the transmitter temperature is increased, it turns out to be proportional to the inverse of the temperature, somax 1/T.

### 6 – 10 Examples of Compton Effect Problems and Discussion

6. An object with a surface area of ​​100cm² has a temperature of 727°C. If the Stefan-boltzman coefficient is 5.67 × 10‾8 W/mK4 and the emissivity of the object is 0.6. Determine the average speed of the radiation energy of the object!

Solution:

7. The maximum radiation wavelength of an object at a temperature T Kelvin is 6000A. If the object’s temperature rises to 3/2 T Kelvin. Determine the maximum radiation wavelength of the object!

Solution:

8. What is the experimental result of the photoelectric effect that cannot be explained by classical theory?

#### Discussion:

• (1) there is a maximum wavelength of irradiating light that can produce this effect.
• (2) The time interval between irradiation of light and the occurrence of photoelectric current does not depend on the intensity of the light
• (3) The kinetic energy of the electrons leaving the cathode depends on the wavelength of the light used.
• (4) Electrons require a certain amount of energy to exit the metal surface (cathode).

9. A metal has a threshold frequency of 4 x 10^14 Hz. If the metal is hit by a photon, it turns out that photo electrons from the metal surface have a maximum kinetic energy of 19.86 × 10‾20 Joules. Calculate the frequency of the photon!

#### Solution

10. The threshold frequency of a metal is 8.0 × 10^14 Hz and the metal is illuminated with light having a frequency of 1015 Hz. If Planck’s constant is 6.6× 10‾34 Js, determine the kinetic energy of the electrons released from the metal surface!

Solution:

11. Look at the following graph!

If 1eV = 1.6 × 10-19 J, the value of f is….

Solution:

12. The threshold frequency of sodium is 4.4×1014 Hz. The magnitude of the stopping potential in volts for sodium when exposed to light with a frequency of 6 × 1014 Hz is….

Solution:

13. Look at the following graph!

The value of K in the graph above is…. (eV)

Solution:

14. A photon with a wavelength of 0.4 nm strikes a stationary electron. In this case, a photon is scattered at an angle of 120° to its original direction. Determine the wavelength of the scattered photons.

Solution:

15. A lamp with a specification of 110 W/220 V is installed at a voltage of 220 V and emits light with a wavelength of 600 nm. If the energy radiated is only 30% of the electrical energy, then the number of photons it produces per second is….

Solution:

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