Quantum Phenomena - exam practice

A proton moving with a speed 𝑣 has a de Broglie wavelength λ.

What is the de Broglie wavelength of an alpha particle moving at the same speed 𝑣?

Electrons moving in a beam have the same de Broglie wavelength as protons in a separate beam moving at a speed of 2.8 × 10⁴ m s^–1.

What is the speed of the electrons?

When comparing X-rays with UV radiation, which statement is correct?

Monochromatic radiation from a source of light (source A) is shone on to a metallic surface and electrons are emitted from the surface. When a second source (source B) is used no electrons are emitted from the metallic surface. Which property of the radiation from source A must be greater than that from source B?

In a photoelectric experiment, light is incident on the metal surface of a photocell. Increasing the intensity of the illumination at the surface leads to an increase in the

An electron collides with a neutral atom and ionizes it. Which of the following describes the particles present after the collision?

A muon and an antimuon annihilate to produce the minimum number of photons.

What is the maximum wavelength of the photons?

Monochromatic light with a photon energy of 4.1 × 10⁻¹⁹ J is incident on a metal surface.

The maximum speed of the photoelectrons released is 4.2 × 10⁵ m s⁻¹.

What is the work function of the metal?

A photon has energy of 1 × 10¹⁸ eV.

An object of mass 0.03 kg has kinetic energy equal to the energy of the photon.

What is the speed of the object?

Light of frequency 2.0 × 10¹⁵ Hz is incident on a metal surface. The work function of the metal is 4.6 × 10^–19 J.

Which statement is correct?