Earths temperature averaged over the year is about 300 Kelvin. At what wavelength does it radiate most strongly? What part of the electromagnetic spectrum does this wavelength lie in? Can you see it?
( you answered my question but it doesnt go under 3000K on the chart. can you help again with this question)
To determine the wavelength at which Earth radiates most strongly, we can use Wien's Law, which states that the wavelength at which an object emits most intensely is inversely proportional to its temperature. The law can be expressed using the equation:
λ_max = (b / T)
Where λ_max is the wavelength at which maximum radiation occurs, b is Wien's constant (approximately 2.898 × 10^-3 m·K), and T is the temperature in Kelvin.
Given that Earth's average temperature is approximately 300 Kelvin, we can calculate the wavelength:
λ_max = (2.898 × 10^-3 m·K / 300 K)
λ_max = 9.66 × 10^-6 m
So, Earth radiates most strongly at a wavelength of approximately 9.66 micrometers (μm). This lies in the infrared part of the electromagnetic spectrum.
As for human vision, our eyes are sensitive to wavelengths ranging from approximately 400 to 700 nanometers (nm), which corresponds to the visible light spectrum. Since Earth's peak radiation occurs at a much longer wavelength of 9.66 μm, it falls outside the range of wavelengths that we can see with our naked eye. However, specialized instruments and cameras can capture and detect infrared radiation.