5.3-Atomic Emission Spectra and Quantum Mechanical Model - 2

The phenomenon in which electrons are ejected when light shines on a metal is known as:

• Quantum effect

• Photoelectric effect

• Planck's theory

• Photon theory

What is the formula of Max Planck's equation?

• E = mc²

• E = hν

• F = ma

• P = IV

The value of Planck's constant (h) is:

• 3.00 x 10⁸

• 1.60 x 10⁻¹⁹

• 6.626 x 10⁻³⁴

• 9.81 m/s²

The SI unit of energy is the:

• Watt (W)

• Newton (N)

• Joule (J)

• Coulomb (C)

What explains why elements change color when heated (e.g., black to red, yellow, and white)?

• Quantum mechanical model

• Max Planck's theory

• Photoelectric effect

• Electromagnetic spectrum

The amount of radiant energy (E) is proportional to the frequency of the radiation (ν). This relationship is expressed by:

• Einstein's equation

• Quantum theory

• Planck's constant

• Coulomb's law

A quantum of light that behaves like a particle is called a:

• Wave

• Electron

• Photon

• Neutron

Which type of light can start the photoelectric effect and eject electrons from a metal?

• Red light

• Infrared light

• Bright light (yellow or white)

If the energy of photons is too low, then it ____ eject the electrons from the metal.

• Always

• Sometimes

• Will not

• Must