# physic

posted by .

Light is shone on a metal and photoelectrons are emitted.
Can you tell me the three things from the list below which might cause the photoelectron emission to stop.

Decreasing the intensity of the light
Increasing the frequency of the light
Decreasing the wavelength of the light
Increasing the wavelength of the light
Changing the metal
Decreasing the frequency of the light
Increasing the intensity of the light

• physic -

past tense of transitive "shine" is "shined"
(the sun shone as the man shined his shoes)

light intensity has no effect on emission, so we want to decrease the energy:

Increasing the wavelength of the light
Decreasing the frequency of the light
or
Changing the metal

• physic -

A bouncy rubber ball is dropped from a height of about a metre above the ground .it falls to the ground, bounces and then rises back to almost the height from which it was dropped. Describe the main energy transformations that take place from the point at which the ball first touches the ground until the point it leaves the ground again.

Gravitational potential energy is converted into kinetic energy and then into sound energy.
IS THAT ANSWER CORRECT, HELP PLZ

## Similar Questions

1. ### physical

Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of …
2. ### Physics

If a metal with a threhold frequency of 1.1 x 10^15 Hz is illuminated by light with a wavelength of 170 nm, then the maximum kinetic energy of the emitted photoelectron will be?
3. ### Science

Light is shone on a metal and photoelectrons are emitted, what are the three things which might cause the photoelectron emission to stop
4. ### physics

When a yellow light shines on a photosensitive metal, photoelectrons are emitted. As the intensity of the light is decreased, the number of photoelectrons emitted per second
5. ### physics

A metallic surface emits photo electrons when green light falls on it. But the metal does not emit when yellow light falls on it. Which of the following is correct when red light falls on the metallic surface?
6. ### science

Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the …
7. ### physics

Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the …
8. ### chemistry

When a photon of light hits the surface of a metal, a photoelectron may be emitted. Some of the photon's energy is required to free the electron from the surface. The remaining energy becomes the kinetic energy of the photoelectron. …
9. ### Physics

An experimenter finds that no photoelectrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photoelectrons of maximum kinetic energy 2.0eV. what frequency of light should be …
10. ### Physical sciences

Suppose light of a longer wavelength has shone on the potassium. Would photoelectrons emission take place exaplain?

More Similar Questions