Chapter 27, Problem 1OQ

To determine

The option proved experimentally.

Answer to Problem 1OQ

Solution:

e) All the above are true.

Given:

1. Light behaves as a wave
2. Light behaves like a particle
3. Electrons behave as a particle
4. Electrons behave as a wave
5. All the above is true
6. Only (a) and (b) is true
7. Only (a) and (c) is true
8. None of the above is true.

Explanation of Solution

1. Light behaves as a wave:

It is proved experimentally light behaves all the properties of a wave. Light can satisfy the conditions reflection, refraction, interference, Doppler effect and diffraction which a wave probably do. So, it proved that light can behave like a wave.

2. Light behaves as a particle:

Light behaves mainly as a wave but in some circumstances, it can also behave like a particle. The light spits up like smaller particles of photons. And these photons carry energy depending upon the wavelength they receive. It is proved by the great scientist Einstein for which he received Noble prize in 1921 for his concept of wave-particle duality.

3. An electron behaves as a particle:

Electron itself acts as a subatomic particle. The term electron was coined by Irish physicist George Johnstone Stoney and it was accepted worldwide. Hendrik Lorentz stated that the mass of particles is termed as an electron.

4. Electrons behave as a wave:

The property of wave by electrons can be easily observed by experiments like other particles like neutrons and protons because electron has the lowest mass. So, the electron behaves like waves.

5. Hence, all four satisfy the conditions, this option is chosen as the correct answer.
6. Although (c) and (d) satisfy the condition this could not be the correct answer.
7. Although (b) and (d) satisfy the condition, this could not be the correct answer.
8. All the above conditions are true hence, this is not the correct answer.

Conclusion:

Thus, option e) is true.