Atomic structure and Quantum theory

Question 1

the nature of light

Answer 1

Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum.
AKA light is a wave

Question 2

wavelength

Answer 2

The wavelength of the wave associated with a moving particle. The wavelength (λ) is given by λ = h / mv , where h is the Planck constant, m is the mass of the particle, and v its velocity. The de Broglie wave was first suggested by Louis de Broglie in 1923 on the grounds that since electromagnetic waves can be treated as particles (photons) one could therefore expect particles to behave in some circumstances like waves.
λ = h / mv
∴ c = λ𝓿

Question 3

Electromagnetic spectrum

Answer 3

The range of wavelengths over which electromagnetic radiation extends. The longest waves (10 5 –10 −3 metres) are radio waves, the next longest (10 −3 –10 −6 m) are infrared waves, then comes the narrow band (4– 7 × 10 −7 m) of visible radiation, followed by ultraviolet waves (10 m).

Question 4

frequency

Answer 4

the number of waves that pass a fixed point in unit time
Hz or s⁻⁻¹
use 𝓿 𝒱 v

Question 5

c

Answer 5

speed of light

2.998 x 10⁸ m/s

Question 6

relationship between wavelength, frequency, and energy

Answer 6

𝓿↑λ↓E↑

𝓿↓λ↑E↓

Question 7

Planck Constant

Answer 7

(Symbol h ). The fundamental constant equal to the ratio of the energy of a quantum of energy to its frequency. It is defined as having a value of exactly 6.626 07015 × 10 −34 Js.

Question 8

E=hv

Answer 8

the energy E can be regarded as a stream of *photons travelling at the speed of light, each photon having an energy hc /λ, where h is the Planck constant, c is the speed of light, and λ is the wavelength of the associated wave.

Question 9

amplitude

Answer 9

the distance from the top of the wave to the middle of the wave (or the bottom of the wave to the center)