1.

When a photoelectric substance was irradiated with a light of frequency 4 xx 10^12 kHz, the photoelectrons emitted whenthe same substance was irradiated with light of frequency 2 xx 10^12 kHz. The work functionof the substance is :

Answer»

`6.6 XX 10^(-19)J`
`6.6 xx 10^(-20) J`
`3.3 xx 10^(-19) J`
`3.3 xx 10^(-20) J`

Answer :A


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