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])

2 Views|Posted 5 months ago

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Alok Kumar Singh | Contributor-Level 10

5 months ago

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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