Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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

The kinetic energy of the emitted electron

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.

None

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

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

All particles can exhibit wave-like characteristics.

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

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

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 halved

It remains the same.

It is doubled

It is quadrupled

None

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 diffraction of light through a narrow slit.

The interference pattern from a double-slit experiment.

The radiation spectrum of a black body.

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 only very high-frequency light could ever cause emission.

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.

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 surface material

Its temperature

Its size and shape

The frequency of the light it absorbs.

None

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

Isaac Newton

Thomas Young

J. J. Thomson

Max Planck

None

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

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

Photons are emitted when electrons transition between discrete energy levels.

Electrons continuously radiate energy as they orbit the nucleus.

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

None

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)?

The number of photoelectrons emitted per second increases

The maximum kinetic energy of the emitted photoelectrons increases.

No electrons are emitted, regardless of the intensity.

None

10.

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

The quantization of atomic energy levels.

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.

None

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