Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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.

None

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 reflection of light from a smooth surface.

The radiation spectrum of a black body.

The interference pattern from a double-slit experiment.

None

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

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.

All particles can exhibit wave-like characteristics.

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

None

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

The frequency of the light it absorbs.

Its surface material

Its size and shape

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.

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

Electrons continuously radiate energy as they orbit the nucleus.

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

None

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

Lasers

Electric bells

Solar cells

Electron microscopes

None

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

Because electrons can only absorb energy in discrete packets.

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 classical wave theory predicts a time delay for low frequencies.

None

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 quadrupled

It remains the same.

It is doubled

It is halved

None

Which of these scientists is credited with conducting the double-slit experiment in 1801, demonstrating that light behaves as a wave?

Max Planck

J. J. Thomson

Isaac Newton

Thomas Young

None

10.

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 only very high-frequency light could ever cause emission.

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 no electrons would be emitted at all.

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

None

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