Question

25 баллов Человеческий глаз может воспринимать свет мощностью 2*10^-17 Вт. Чему равно количество фотонов, фиксируемых глазом за 1 секунду, если длина волны 0,5 мкм

Answer 1

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Answer 2

Calculation of the Number of Photons

To calculate the number of photons that the human eye can perceive in one second, we need to use the formula:

Number of photons = Power of light / Energy of one photon

Given: - Power of light = 2 * 10^-17 W - Wavelength = 0.5 μm (micrometers)

To calculate the energy of one photon, we can use the equation:

Energy of one photon = Planck's constant * speed of light / wavelength

Planck's constant (h) is approximately 6.626 x 10^-34 J·s, and the speed of light (c) is approximately 3 x 10^8 m/s.

Let's calculate the energy of one photon first:

Energy of one photon = (6.626 x 10^-34 J·s) * (3 x 10^8 m/s) / (0.5 x 10^-6 m)

Using this equation, we can calculate the energy of one photon.

Calculation

Energy of one photon = (6.626 x 10^-34 J·s) * (3 x 10^8 m/s) / (0.5 x 10^-6 m)

Now, let's calculate the number of photons using the power of light and the energy of one photon:

Number of photons = Power of light / Energy of one photon

Substituting the values:

Number of photons = (2 x 10^-17 W) / (Energy of one photon)

Let's calculate the number of photons using the given values.

Calculation

Number of photons = (2 x 10^-17 W) / (Energy of one photon)

Please note that the calculation may take some time.