TOPIC 7

As the frequency of light decreases, what effect does this have on the energy of the photon?

• Increases

• Decreases

• Remains constant

• Becomes zero

In the equation E=hf, what does E represent?

• Energy of the Photon

• Frequency of the Photon

• Wavelength of the Photon

• Planck's constant

If the threshold frequency of a material is 4 × 10¹⁴ Hz, what is the minimum energy needed to release an electron from its surface?

• 2.6 × 10⁻¹⁹ J

• 4.0 × 10⁻¹⁹ J

• 6.6 × 10⁻¹⁹ J

• 1.6 × 10⁻¹⁹ J

What is the equation that relates energy to wavelength and Planck's constant?

• E = hc / λ

• E = hλ

• E = mλ² / h

• E = λh2

What experiment, conducted by Albert Einstein, provided evidence for the quantization of light and led to the development of quantum theory?

• Photoelectric Effect

• Double-Slit Experiment

• Compton Scattering

• Blackbody Radiation

Which phenomenon demonstrates the wave nature of light by causing it to bend around obstacles?

• Photoelectric effect

• Diffraction

• Emission of photons

• Cathode ray production

Which of the following represents the wave-particle duality of matter?

• Electrons behaving as particles

• Protons behaving as particles

• Electrons behaving as a wave

• All the above

Who is credited with the development of the theory that describes the concept of wave-particle duality?

• Isaac Newton

• James Clerk Maxwell

• Louis de Broglie

• Albert Einstein