An Ideal Blackbody in Physics and Astronomy Is an Object

question 175

Multiple Choice

An ideal blackbody in physics and astronomy is an object that

• A) emits only infrared light and hence appears black to the eye.
• B) does not emit or absorb any electromagnetic radiation.
• C) absorbs and emits electromagnetic radiation at all wavelengths.
• D) absorbs all electromagnetic radiation but emits none.

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Definitions:

Gametophytes

The haploid, gamete-producing phase in the life cycle of plants and algae.

Gymnosperms

Gymnosperms are a group of seed-producing plants that includes conifers, cycads, ginkgo, and gnetophytes, characterized by seeds that are not enclosed by a fruit.

Angiosperms

A group of plants that have flowers and produce seeds enclosed within a carpel; the largest group of living plants.

Celery Stalks

The long, fibrous, edible portions of the celery plant, commonly consumed as a vegetable or used in cooking for their flavor.