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when M radiat...

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when M radiations of frequencies 4\ast10^{15} Hz and 6\ast10^{15} Hz fall on the same metal in different experiments,the ratio of maximum kinetic energy of electrons liberated is 1:3.The threshold frequency for the metal is?

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Q. When the electromagnetic radiations of frequencies

4 \times 10^{15} H z

6 \times 10^{15} H z

fall on the same metal, in different experiments, ratio of maximum kinetic energy of electrons liberated is

1 : 3

. The threshold frequency for the metal is:

Q. The threshold frequency of the metal is

10^{14}

Hz. Calculate the kinetic energy of an electron emitted when the radiation of frequency

1.1 \times 10^{15}

Hz hits the metal.

Q. What is the maximum kinetic energy of the electron ejected when light of frequency

3.5 \times 10^{15} H z

falls on a metal having threshold frequency

1.5 \times 10^{15} H z

Q. If threshold frequency for a metal is

5 \times 10^{14} Hz

. Find the ratio of

(K . E)_{max}

of emitted electrons when its surface is irradiated with radiations of frequencies

7 \times 10^{14} Hz

9 \times 10^{14} Hz

Q. When a metal plate is radiated with

1.6 \times 10^{16}

Hz frequency, the kinetic energy of ejected electron is 3 times of kinetic energy when the same metal plate is irradiated with frequency of

10^{16}

Hz. What is the threshold frequency of metal?

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