Determine the wavelength of the red border of the photoelectric effect for silver

Determine the wavelength of the red border of the photoelectric effect for silver (work function = 0.69 × 10⁻¹⁸ J; h = 6.6 · 10⁻³⁴ J · s)

Data: Out. (work of electron outputs from silver) = 0.69 * 10 ^ -18 J.

Reference values: C (speed of light) = 3 * 10 ^ 8 m / s; h (Planck’s constant) = 6.62 * 10 ^ -34 J * s.

The wavelength of the red border of the photoelectric effect for silver can be calculated by the formula: λ = h * C / Aout.

Let’s make the calculation: λ = 6.62 * 10 ^ -34 * 3 * 10 ^ 8 / (0.69 * 10 ^ -18) = 2.88 * 10 ^ -7 m (0.288 μm).

Answer: The wavelength of the red border of the photoelectric effect for silver is 0.288 microns.