CHEMISTRY

The new era in physics started in 1900 with a young German physicist named? 

• Max Planck

• Neils Bohr

• Louie de Broglie

• Werner Heisenberg

Bohr discovered that atoms and molecules emit energy only in certain discrete quantities, or quanta.

• True

• False

Answer explanation

Planck discovered that atoms and molecules emit energy only in certain discrete quantities, or quanta.

It can be thought of as a vibrating disturbance by which energy is transmitted.

• Wave

• Wavelength

• Frequency

• Amplitude

The speed of a wave only depends in the nature of the medium through which the wave is traveling (for example, air, water, or a vacuum) regarding whatever type of wave it has.

• True

• False

Answer explanation

The speed of a wave depends on the type of wave and the nature of the medium through which the wave is traveling (for example, air, water, or a vacuum).

λ (lambda)

• Wavelength

• Frequency

• Amplitude

ν (nu)

• Wavelength

• Frequency

• Amplitude

It is the distance between identical points on successive waves.

• Wavelength

• Frequency

• Amplitude

It is the number of waves that pass through a particular point in one second.

• Wavelength

• Frequency

• Amplitude

It is the vertical distance from the midline of a wave to the peak or trough.

• Wavelength

• Frequency

• Amplitude

It is the emission and transmission of energy in the form of electromagnetic waves.

• Electromagnetic Radiation

• The Photoelectric Effect

• The Particle-Wave Duality of Light