Dual Nature of Matter IIT JEE Questions
Q1: What is De-broglie wavelength of an alpha-particle accelerated through a potential difference V
- 0.287/√V A
- 12.27/√V A
- 0.101/√V A
- 0.202/√V A
Option (3) is Correct
I = h/√2mE = h/√2ma×Qa×V
Putting Qa = 2×1.6×10-19 C
ma = 4mp = 4× 1.67×10-27 kg
I = 0.101/√V
Q2: Kinetic energy of electron and proton is 10-32 J. Then the relation between their de-broglie wavelength is
- Ip < Ie
- Ip > Ie
- Ip = Ie
- Ip = 2Ie
Option (1) is Correct
Q3: A metallic surface is illuminated with radiation of wavelength λ, the stopping potential is Vo . If the same surface is illuminated with radiation of wavelength 2λ. The stopping potential becomes Vo/4. The threshold wavelength for this metallic surface will be
- 3λ
- 4λ
- 3/2 λ
- λ/4
Option (1) is Correct
Q4: In photo electric effect
- A. The photocurrent is proportional to the intensity of the incident radiation.
- B. Maximum Kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.
- C. Max. K.E with which photoelectrons are emitted depends on the frequency of incident light.
- D. The emission of photoelectrons require a minimum threshold intensity of incident radiation.
- E. Max. K.E of the photoelectrons is independent of the frequency of the incident light.
Choose Correct Statements from the options given below:
- A and E only
- A and B only
- B and C only
- A and C only
Option (4) is Correct
Q5: If maximum kinetic energy of a photoelectron is 3 eV. What is its stopping potential?
Since Kmax = eVo
Stopping Potential (Vo) = Kmax/e = 3V
Q6: Find the ratio of de-Broglie wavelengths associated with two electrons accelerated through 25 V and 36 V.
λ = 1/√V
λ1/ λ2 = √V2/V1 = √ 36/25 = 6/5
Therefore, λ1 : λ2 = 6 : 5
Dual Nature of Matter
Dual Nature of Matter states that a matter exhibits both Particle Nature and Wave Nature. It means that when a matter is at rest it behaves like a particle and when it is moving it behaves like wave. Different Experiments have been performed to prove this by the science community.
In this article, we will look into this theory and understand the dual nature of matter. We will also learn the experiments that proved the dual nature of matter.
Table of Content
- What is Dual Nature of Matter
- Particle Nature of Light
- Compton Scattering
- Davisson and Germer Experiement
- Wave Nature of Matters
- De-Broglie Hypothesis
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