1.2- Quantum Model Flashcards
What is blackbody radiation?
Heated to incadescence/glowing as it is emitting radiant energy
Why do heated black bodies turn white/yellowlglow ?
Higher the tempurature the more emissions of visible light (yellow)
What happens to energy as tempurature increases?
Energy of emitted light should increase continuously
T/F: matter could absorbor emitted in any quantity of energy
True
How is light distributed ?
All throughout infrared visible , ultraviolet
Correlation between tempurature and frequency
Higher the tempuratue the higher the frequency
What did max planck ‘s hypothesis
Matter at the atomic level can absorb or emit only discrete quantities of energy
Light emitted by a hot solid is quantized
In what unit is light emitted
Light is emitlel by hot solid and in bursts and quanta
Define: quanta
Very small packets of energy
What is plank’s conclusion?
Ehergy of an atom is quantized
Can light energy be quantized
Yes, light energyis quantized
How does energy travel?
In waves as photons
What is the photoelectric effect?
As photons hit a metal if there is a high enough frequency an electron will be emitted but if there was not frequent enough no electronwould be emitted
How does an electron change energy levels?
Energy is emitted and absorbed to satisfy the difference between levels
Different between ground and excited state
Ground state: where electrons are usually found with least energy
Excited state: more energetic
Why are there different colours
Excited atoms emit energy in form of light so the shorter the wave length and higher frequemy the more purple
What do the different lines of line spectra mean?
Energy transition within the atom
What happens when electron falls to lower energy level
A photon is emitted which contains the enagy originally in higher energy level
Explain how electrons produce spectra viewed on spectra scope
When energy in the form of heat or light reaches electrons it absorbs that energy and changes energy levels (n) and when returning back to ground state the release photons and can beseen in spectra lines
