Revision

Question 1

Peak wavelength hotter objects

Answer 1

The peak wavelength of this distribution is shorter for hotter objects

Question 2

The peak wavelength for cold objects

Answer 2

The peak wavelength of this distribution is longer for colder objects

Question 3

At all wavelength

Answer 3

The radiation emitted per unit surface area pee unit of time for hotter objects is GREATER

Question 4

Continuous spectra

Answer 4

When larges amount of engery is produced casuinf the enegery levels to interact with eachother. This means that their is infinite number of frequencies produced

Question 5

Line emission

Answer 5

When an electron is in the excited States and moves to a lower energy level emitting a photon. Different transitions produce different frequency

Question 6

Why are the lines brighter

Answer 6

More electrons make transition so more photon are emitted

Question 7

Adsorption spectra

Answer 7

When electrons more up to a higher enegery level by absorbing a photon. The photons are absoed ar different frequency into the sun atmosphere

Question 8

223
Fr decays by beta session
87

Answer 8

88

Question 9

The greater the refractive index

Answer 9

The smaller the critical angle and therefore more reflection

Question 10

How to increase capacity

Answer 10

Increase the supply voltage

Question 11

How can a semi conductors conduct at room temperature

Answer 11

The gao between the conduction and valance band is small
Some electrons have enough engery to go from the valance band to the conduction band