Indian Navy Pilot Dual Nature of Radiation and Matter — practice questions

Explore 2 free Dual Nature of Radiation and Matter questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Dual Nature of Radiation and Matter with Quill →

Dual Nature of Radiation and Matter questions and exercises with answers

Showing questions 1–2 of 2.

de Broglie wavelength λ associated with a particle of momentum p:Read the answer and worked solution →de Broglie wavelength of electron accelerated through V volts:Read the answer and worked solution →

Worked practice questions

de Broglie wavelength λ associated with a particle of momentum p:

hc/p
h × p
h / p (wave-particle duality)
p / h

Show answer and solution

Correct answer: C. h / p (wave-particle duality)

λ = h/p. Every moving particle has wave-like properties with wavelength inversely proportional to momentum. For ordinary objects λ is unmeasurably small for electrons λ is on atomic scale.

Open this question →

de Broglie wavelength of electron accelerated through V volts:

h / V
h / sqrt(2 m e V) ≈ 12.27/sqrt(V) Å
mV
h × V

Show answer and solution

Correct answer: B. h / sqrt(2 m e V) ≈ 12.27/sqrt(V) Å

KE = eV, p = sqrt(2 m × KE) = sqrt(2 m e V). λ = h/p. **For electron:** λ ≈ 12.27/sqrt(V) Å (V in volts). e.g., V = 100 V: λ ≈ 1.23 Å.