Webp(a) = geometric reflectivity = ratio of planet brightness to the brightness of a perfectly diffusing circular disc of the same position and apparent size as the planet. The incoming solar radiation is considered to be normal to the disc at all phase angles. WebThe planet TrES-1, orbiting a distant star, has been detected by both the transit and the Doppler technique, so we can calculate its density and get an idea of what kind of planet it is. a. Using the method of Mathematical Insight $13.3,$ calculate the radius of the transiting planet. The planetary transits block $2 \%$ of the star's light.

Albedo and reflectivity SpringerLink

Web3. Black has the lowest reflectivity. 4. Surfaces such as snow, ice, sand, and water would be expected to give a planet high reflectivity. The results of this experiment suggest that light-colored and shiny surfaces reflect light best. 5. Planet Earth has high reflectivity because much of it is covered by snow, ice, sand, and water. WebOverall, Earth reflects about 29% of the incoming solar radiation, and therefore, we say the Earth’s average albedo is 0.29. Snow and ice, airborne particles, and certain gases have … riddick cast 2013 movie

Measuring Earth’s Albedo - NASA

Web17. dec 2024 · Asteroids have a wide range of reflectivities that depend on their composition. Carbon-rich asteroids can reflect as little as 2% of the light that falls on them, Reddy notes. Other types, including silicon-rich stony asteroids, have an albedo that’s 10 or more times that. WebThe shape of the mean spectral geometric albedo curve between 0.3 and about 1.3 microns for Mars is defined to within a few percent. Spectral reflectivity curves based on relative … riddick claws