Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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.

All particles can exhibit wave-like characteristics.

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

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

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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?

Corpuscles

Quanta

Photons

Electrons

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In the photoelectric effect, what happens if the intensity of the incident light is increased while the frequency remains the same (and above the threshold frequency)?

No electrons are emitted, regardless of the intensity.

The number of photoelectrons emitted per second increases

The maximum kinetic energy of the emitted photoelectrons increases.

The number of photoelectrons emitted per second increases

None

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

The quantization of atomic energy levels.

The law of conservation of energy for the photoelectric effect.

The creation of energy from a photon.

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

None

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

Electric bells

Lasers

Solar cells

Electron microscopes

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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 reflection of light from a smooth surface.

The radiation spectrum of a black body.

The diffraction of light through a narrow slit.

The interference pattern from a double-slit experiment.

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

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

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.

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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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A black body is described as an ideal absorber and emitter of electromagnetic radiation. What determines the frequency (and color) of the radiation it emits?

Its temperature

Its size and shape

The frequency of the light it absorbs.

Its surface material

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10.

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

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

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

Electrons continuously radiate energy as they orbit the nucleus.

Photons are emitted when electrons transition between discrete energy levels.

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