Why Will Proposed Future Experiments to Search for Earthlike Planets

question 50

Multiple Choice

Why will proposed future experiments to search for Earthlike planets use the infrared portion of the spectrum?

• A) Earth's atmosphere is more transparent over this wavelength range than at any other wavelength.
• B) Only at these wavelengths will spectra show spectral signatures that are identifiable as originating on Earthlike planets.
• C) The ratio of IR to visible radiation from planets is much higher than for their parent stars.
• D) It is the easiest spectral range to study from ground-based telescopes.

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Definitions:

Axillary Vein

A large blood vessel that conveys blood from the lateral aspect of the thorax, axilla, and upper limb toward the heart.

Veins

Blood vessels that carry deoxygenated blood towards the heart from the body's tissues.

Tunica Media

The middle layer of the wall of blood vessels, made up of smooth muscle cells and elastic fibers.

Tunica Externa

The outermost layer of a blood vessel, composed of connective tissue, which provides structural support and flexibility.