Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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.

None

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

Electric bells

Solar cells

Lasers

Electron microscopes

None

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

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.

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

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?

The frequency of the light it absorbs.

Its size and shape

Its temperature

Its surface material

None

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

Photons

Electrons

Corpuscles

None

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

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.

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

All particles can exhibit wave-like characteristics.

None

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

J. J. Thomson

Isaac Newton

Thomas Young

Max Planck

None

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

The quantization of atomic energy levels.

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

The law of conservation of energy for the photoelectric effect.

The creation of energy from a photon.

None

10.

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

1 out of 10