Light of intensity 10^(-5) W//m^2 falls on a sodium photocell of surface area 2 cm ^2 . Assuming that top 5 layers of sodium absorb the incident energy , the estimated time required for photoelectric emission considering wave model of light is approximately. ("given" rho=0.971 gm//c""c, "mass"=23 gm//mol, "work function" =2eV, "Atomic number"=11)

Light of intensity 10^(-5) W//m^2 falls on a sodium photocell of surfa

1.	Light of intensity 10^(-5) W//m^2 falls on a sodium photocell of surface area 2 cm ^2 . Assuming that top 5 layers of sodium absorb the incident energy , the estimated time required for photoelectric emission considering wave model of light is approximately. ("given" rho=0.971 gm//c""c, "mass"=23 gm//mol, "work function" =2eV, "Atomic number"=11)
Answer» `10^5` SEC `10^6` sec `10^7` sec `5xx10^7` sec Answer :B

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