Question

The ratio between the reflected to the incident energy on a surface at a particular wavelength gives the _____ of the surface

• A. \( \text{Spectral reflectance} \)
• B. \( \text{Spectral transmittance} \)
• C. \( \text{Spectral radiance} \)
• D. \( \text{Spectral irradiance} \)

Hint:

Reflectance is the 'bounciness' of energy off a surface at specific colors (wavelengths).

Answer 1

The Correct Option is A

Spectral reflectance is defined as the ratio of the energy reflected by a surface to the energy incident upon it as a function of wavelength. Spectral transmittance is the ratio of transmitted to incident energy, spectral radiance is the power emitted per unit area per unit solid angle, and spectral irradiance is the power incident per unit area.