Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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

The creation of energy from a photon.

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

The law of conservation of energy for the photoelectric effect.

The quantization of atomic energy levels.

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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 electrons would be emitted randomly, not instantaneously.

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.

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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?

Photons

Corpuscles

Electrons

Quanta

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

The frequency of the incident light.

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

The total energy of the incident photon.

The kinetic energy of the emitted electron

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

Electric bells

Electron microscopes

Solar cells

Lasers

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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.

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

The diffraction of light through a narrow slit.

The radiation spectrum of a black body.

The interference pattern from a double-slit experiment.

The reflection of light from a smooth surface.

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According to the relationship E=hf, if the frequency of a light wave is doubled, what happens to the energy of a single photon of that light?

It is doubled

It is halved

It is quadrupled

It remains the same.

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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 continuously radiate energy as they orbit the nucleus.

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

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

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10.

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

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

Power is inversely proportional to the number of photons emitted.

Power is independent of the number of photons emitted.

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

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