A monochromatic of light operating 200 W emits 4times 10-20- photons per second- Find the wavelength of the light -in times 10-7-m-

Question

Toppr Admin · Accepted Answer

We know that -xA0-Power - -Number of photons per second - -xD7- hC-x3BB-xA0-200 -xA0-4-xD7-1020-xD7-2-xD7-10-x2212-25-x3BB-x2234-x3BB- - 4-xD7-10-x2212-7 m

A monochromatic source of light operating at 200 W emits $4 \times 10^{20}$ photons per second. Find the wavelength of the light $(i n \times 10^{- 7} m)$

We know that , Power = (Number of photons per second ) $\times$ $\frac{h C}{λ}$
200 = $4 \times 10^{20} \times \frac{2 \times 10^{- 25}}{λ}$
$∴ λ$ = 4 $\times 10^{- 7}$ m

A monochromatic source of light operating at 200 W emits 4×1020 photons per second. Find the wavelength of the light (in×10−7m)

We know that , Power = (Number of photons per second ) × hCλ 200 = 4×1020×2×10−25λ∴λ = 4×10−7 m

A monochromatic source of light operating at 200 W emits $4 \times 10^{20}$ photons per second. Find the wavelength of the light $(i n \times 10^{- 7} m)$

We know that , Power = (Number of photons per second ) $\times$ $\frac{h C}{λ}$
200 = $4 \times 10^{20} \times \frac{2 \times 10^{- 25}}{λ}$
$∴ λ$ = 4 $\times 10^{- 7}$ m