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

Power is independent of the number of photons emitted.

Power is inversely proportional to the number of photons emitted.

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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?

Quanta

Electrons

Photons

Corpuscles

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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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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 classical wave theory predicts a time delay for low frequencies.

Because electrons can only absorb energy in discrete packets.

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

Lasers

Solar cells

Electric bells

Electron microscopes

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

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

The frequency of the incident light.

The kinetic energy of the emitted electron

The total energy of the incident photon.

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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 halved

It is doubled

It remains the same.

It is quadrupled

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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 size and shape

Its surface material

The frequency of the light it absorbs.

Its temperature

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

J. J. Thomson

Thomas Young

Max Planck

Isaac Newton

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10.

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

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.

Photons are emitted when electrons transition between discrete energy levels.

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