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1800-102-2727The dual nature of matter and radiation refers to the two natures of every object, which is associated with wave and particle nature. This dual nature of matter and radiation is known as wave-particle duality. De Broglie Wavelength explains that the wavelength of an object is related to its mass and momentum. It explains the dual nature of matter; that is, it can act both like particles and waves.
Table of Contents:
The dual nature of radiation and matter refers to the dual property of matter in nature. They are particle nature and wave nature. A matter shows the wave nature by exhibiting the phenomenon of interference and diffraction. It shows particle nature by exhibiting the packets of light. Both these phenomena are exhibited by electromagnetic radiation.
When electromagnetic radiation like light strikes the surface, the photoelectric effect takes place. This photoelectric effect leads to the emission of electrons. The effect depends on many factors, such as potential, intensity and frequency of the radiation.
The wave theory of light explains concepts such as the phenomenon of diffraction, polarisation, interference, etc. According to wave theory, the electrons remain on the surface of the metal. It absorbs the radiant energy of the surface.
Einstein’s theory of the photoelectric equation states that electrons don’t absorb radiation continuously. Quanta of energy of radiation create the radiation energy. Thus photoelectric equation is given as follows:
KE = hv – hv0
KE refers to the kinetic energy of the photoelectron, where h is Planck's constant.
v= frequency of photons.
v0 = threshold frequency of material.
If a particle acts as a wave, then it has a frequency and a wavelength. De Broglie’s theory states that if a free particle with mass ‘m’ is moving with a speed of ‘v’, then the wavelength is related to its momentum, i.e., p=mv.

For an electron, the de Broglie wavelength equation:
m = mass of the electron
v = velocity of the electron
mv = the momentum of the electron.
Einstein’s equation: E=mc2……. (i)
Here, E refers to energy, m means mass, and c is the speed of light 
According to Plank’s equation of quantum energy, E is directly proportional to the radiation frequency.

Energy from a moving particle is directly proportional to the wave frequency and inversely proportional to the wavelength. Electromagnetic radiation is emitted due to the acceleration of charged particles in an atom. Atoms radiate photons when they are accelerated.

Q1. The incident ray frequency is directly proportional to __________.
a. incident ray momentum
b. incident ray intensity
c. Both a and b correct
d. None of the above
Ans: b. incident ray intensity
The incident ray frequency is directly proportional to the incident ray intensity.
Q2. Which of the following is not correct?

Q3. Which of the following is correct about the photoelectric equation?

Q1. What is the De Broglie formula?
Answer: The De Broglie wavelength equation:
which stands for the wave of the electron, ‘m’ stands for the mass of the electron and ‘v’ stands for the velocity of the electron.
Q2. What is the application of the De Broglie theory?
Answer: De Broglie equation applies to all the particles that have wave-particle duality.
Q3. What is the speed of light?
