Why is it better to search for extrasolar planets directly using infrared (IR) rather than visible radiation?

A) the planet doesn't reflect any visible radiation, only IR radiation
B) the star doesn't emit any IR radiation because it is too hot
C) the visible light from planets will be blocked by interstellar dust along our line of sight while the IR radiation will not
D) the planet emits more IR radiation than it reflects in the visible


D

Physics & Space Science

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What is the wavelength of a monochromatic light beam, where the photon energy is 2.15 eV? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 nm = 10?9 m, and 1 eV = 1.6 × 10^?19 J)

a. 308 nm b. 578 nm c. 223 nm d. 156 nm e. 475 nm

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What will be an ideal response?

Physics & Space Science

The formula mass for C2H6 is ______________

Fill in the blank(s) with correct word

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Two objects of different mass are released simultaneously from the top of a 20-m tower and fall to the ground. If air resistance is negligible, which statement best applies?

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Physics & Space Science