Two identical photo-cathodes receive the light of frequencies f? and f? respectively. If the velocities of the photo-electrons coming out are v? and v? respectively, then
Two identical photo-cathodes receive the light of frequencies f? and f? respectively. If the velocities of the photo-electrons coming out are v? and v? respectively, then
Option 1 -
v₁² - v₂² = (2h/m)[f₁ - f₂]
Option 2 -
v₁² + v₂² = (2h/m)[f₁ + f₂]
Option 3 -
v₁ + v₂ = √((2h/m)[f₁ + f₂])
Option 4 -
v₁ - v₂ = √((2h/m)[f₁ - f₂])
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1 Answer
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Correct Option - 1
Detailed Solution:The equation representing the photoelectric effect is given as:
(1/2)mv? ² = hf? - φ . (1)This continues the solution from number 6 on the previous page.
(1/2)mv? ² = hf? - φ . (2)
With the help of equations (1) and (2), we can write:
v? ² - v? ² = (2h/m) (f? - f? )
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