Chapter 3.3 Flashcards
An energy packet is called ___ and the energy each packet is directly proportional to its ______ and inversely proportional to its _______.
Quantum; Frequency; Wavelength
Based on the equation below which is true? Lambda = h/mu h = plank's constant m = mass u = speed
- Particles with a high wavelength must have a low mass
- in order to max the wavelength, one should increase the value of h.
- particles with a high mass will have a small de Broglie Wavelength
- particles moving very slowly will have a long de Broglie Wavelength
- Wrong:
Wavelength depends on both mass and speed. - Wrong:
Plank’s constant is a constant, it is not adjustable. - Correct:
Particles with a high mass will have a small de Broglie Wavelength - Correct:
Particles moving very slowly will have a long de Broglie wavelength
Which of the following statements correctly describe wave-particle duality? Select all that apply.
- Photons are rare particles that exhibit only wavelike behavior
- Only small particles like electrons exhibit wavelike particles
- All matter exhibits wavelike properties
- All matter exhibits wavelike properties
What equation shoes the relationship between frequency and energy?
Energy = planks constant * frequency
E = hv
Which statements correctly describe a photon?
- All photons have the same amount of energy
- Matter cannot absorb or emit a fraction of a photon.
- A high-frequency photon has low energy.
- A photon is a particle of electromagnetic radiation.
- Matter cannot absorb or emit a fraction of a photon; energy is quantized
- A photon is a particle of electromagnetic radiation.
Which of the following statements best describes de Broglie’s deduction regarding the relationship between particle and wave properties?
- Electrons are unique, in that they exhibit wavelike properties and particle-like properties
- Every particle may be promoted to an excited state when given a certain amount of energy
- All waves can behave like particles and all particles can behave like waves.
- Every given particle in a given energy state has multiple associated wavelengths
- All waves can behave like particles and all particles can behave like waves
Which of the following statements correctly describe atomic line spectra?
- Each element has its unique atomic line spectrum
- An atom emits radiation that contains all wavelength and emag spec
- An atom emits radiation continuously to produce a line spectrum
- An atomic line spectrum arises from emission of light of specific wavelengths
- Atomic line spectra include radiation outside the visible range of the em spectrum
- Each element has its own unique atomic line spectrum
- An atomic line spectrum arises from emission of light of specific wavelengths
- Atomic line spectra includes radiation outside the visible range of em spectrum
The energy of a photon with a frequency of 1.0 X 10^-15 s^-1 is equal to ____ J.
h = 6.63 x 10 ^ -34 J*s
6.6 x 10 ^ -19
E = hv
6.63 x 10^-34 * 1.0 x 10^15
In a photoelectric diode, no current will flow unless light of a certain minimum “threshold” frequency is used. Which of the following explains this observation correctly?
- the photons of light must be moving fast enough to dislodge the electrons from the metal
- intensity of light must be sufficient to allow electrons to break free from the metal
- Energy of the photons of light must match or exceed the energy needed for elections to break free from the metal
Energy of the photons of light must match or exceed the energy needed for electrons to break free from the metal
If a solid object is heated to a high enough temp it will begin to glow. The color of light it emits depends on the temperature. This relationship between color and temperature implies a relationship between ____.
- Energy and amplitude
- Energy and frequency
- Frequency and wavelength
- Energy and frequency
Temperature is related to energy and frequency and wavelength is related to color.
