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② Threshold frequency ofa photo electric cell as 5.oox104 HZ. Il a light say of 6 x 10'4 Hz frequency dieincised onitthem17 whether electron will emit or not.is what will happened? If intensity of incident Lightis increase.mis what will happened? It frequency of incidentof incidentMayis increase to 7x1014 Haz​

Answer»

ANSWER:

GIVEN, (In AIR)

VELOCITY V=340m/s

Frequency f=20,000Hz

Wavelegth λ=?

V=f.λ

λ=FV=20,000340=0.017Hz

Also, Given (in WATER)

Velocity, V=1480m/s

Frequencyf=20,000Hz

wavelength, λ=?

V=F.λ

λ=FV=20,0001480=0.074Hz



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