Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

Which phenomenon could not be explained by classical wave theory but was successfully explained by Max Planck's quantum theory?

The interference pattern from a double-slit experiment.

The diffraction of light through a narrow slit.

The reflection of light from a smooth surface.

The radiation spectrum of a black body.

None

How does Niels Bohr's model of the atom explain the production of line spectra?

Photons are emitted when electrons transition between discrete energy levels.

Electrons can orbit the nucleus at any distance with any energy.

The nucleus of the atom emits photons when it is excited.

Electrons continuously radiate energy as they orbit the nucleus.

None

Albert Einstein expanded on Max Planck's quantum theory by proposing that light itself exists in discrete packets of energy. What are these packets called?

Electrons

Photons

Corpuscles

Quanta

None

The concept of wave-particle duality, introduced by Louis de Broglie, suggests that:

Only massless entities like photons can exhibit both wave and particle properties.

Light behaves only as a wave, and particles like electrons behave only as particles.

Wave properties and particle properties are mutually exclusive and can never be observed for the same entity.

All particles can exhibit wave-like characteristics.

None

A key feature of the photoelectric effect is that photoelectrons are emitted almost instantaneously when light shines on the metal (if f>f 0). Why did this observation conflict with classical wave theory?

Classical theory predicted that no electrons would be emitted at all.

Classical theory predicted that it would take time for an electron to absorb enough energy from a continuous wave to be ejected.

Classical theory predicted that only very high-frequency light could ever cause emission.

Classical theory predicted that electrons would be emitted randomly, not instantaneously.

None

Why does a 'threshold frequency' exist for the photoelectric effect?

Because the intensity of the light is not high enough.

Because electrons can only absorb energy in discrete packets.

Because classical wave theory predicts a time delay for low frequencies.

Because the incoming photon must have enough energy to overcome the metal’s work function.

None

What is the relationship between the power (P) of a light source and the number of photons (n) it emits per second?

Power is independent of the number of photons emitted.

Power is equal to the number of photons emitted per second multiplied by the energy of each photon.

Power is the energy of a single photon divided by the number of photons.

Power is inversely proportional to the number of photons emitted.

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Which of the following applications directly uses the photoelectric effect to generate an electric current from light?

Solar cells

Lasers

Electron microscopes

Electric bells

None

What is the 'work function' (W) in the context of the photoelectric effect?

The frequency of the incident light.

The kinetic energy of the emitted electron

The minimum energy required to release an electron from a metal surface.

The total energy of the incident photon.

None

10.

Einstein's photoelectric equation is given by hf=W+K max . What does this equation represent?

The relationship between a particle’s momentum and its wavelength.

The law of conservation of energy for the photoelectric effect.

The creation of energy from a photon.

The quantization of atomic energy levels.

None

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