The Standard Model 7

Question 1

What is irradiance defined as

Answer 1

The power received per unit of area

Question 2

What is a point source of light

Answer 2

A point source of light is one where the light spreads out evenly in all directions.

Some examples are - stars , distant light bulbs

Question 3

Is a laser a point source

Answer 3

No

Question 4

What happens to the irradiance of the point source when the light moves further away

Answer 4

Decreases

Question 5

What happens to the irradiance when the distance travelled doubles

Answer 5

The irradiance quarters

Question 6

What do electrons release when they drop down an energy level

Answer 6

They release a photon

Question 7

How can electrons jump up energy levels

Answer 7

By absorbing photons of light

Question 8

Can electrons jump from energy level to energy level

Answer 8

Yes

Question 9

Can electrons occupy the space in between energy levels

Answer 9

No

Question 10

Do energy levels have a negative value and why

Answer 10

Yes because it represents the energy needed for an electron to escape the atom

Question 11

What’s does a big frequency mean for wavelengths

Answer 11

It means the wavelength will be small