## anonymous one year ago A photo cell emits electrons when yellow light falls on it. Which of the following statements is correct if a light of frequency that is two times yellow light falls on it? Velocity of the emitted electrons decreases. Velocity of the emitted electrons increases. Number of the emitted electrons increases. Number of emitted electrons decreases.

1. anonymous

@dan815

2. dan815

the speed of the electron depends on the frequency or energy applied to the electron to displace it form the metal. when the light remains blue, the frequency of the light is the same, but when there are 2 sources there is more light so more electrons can be hit, but they will always eject at the same energy level

3. anonymous

Number of the emitted electrons increases. ??

4. dan815

5. anonymous

Number of emitted electrons decreases.

6. dan815

you have more electrons ejected where there is more photos hitting electrons that means there is more light, but the energy each electron receives from the photon depends on the frequency of the photon

7. anonymous

.

8. dan815

that energy the electron has translates into kinetic energy 1/2 mv^2 and you see the velocity increase there

9. anonymous

so is this correct? Number of emitted electrons decreases.

10. dan815

no

11. dan815

the velocity of the electrons increase

12. anonymous

Which of the following summarizes Rutherford's model of the atom? Electrons are embedded in a positive region of spherical dimension. Electrons revolve around the nucleus without emitting radiation. Electrons revolve around the nucleus like planets move around the sun. Atoms emit radiation only when electrons jump from a higher energy state to a lower energy state.

13. dan815

|dw:1438018480505:dw|

14. dan815

no matter what the frequency of the photon is it cannot hit more surface area right, there is only 1 contanct point

15. anonymous

#2

16. dan815

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17. dan815

the number of wave cycles over time is determines the frequency frequency = cycles/second

18. anonymous

Atoms emit radiation only when electrons jump from a higher energy state to a lower energy state. ???

19. anonymous

@dan815

20. dan815

I think so