Question

Interstellar dust is effective at blocking visible light because Choose one: A. the dust is so dense. B. dust grains are so small. C. dust grains are so large. D. dust grains are so few.

Answer 1

Answer: Interstellar dust is effective at blocking visible light because dust grains are so small.

Explanation: To find the answer, we need to know more about the interstellar dust.

What is interstellar dust?

• Interstellar dust developed from dying stars as they burn out.
• This dust can block the visible light as well as UV emerging from the stars, because dust grains can block light at optical wavelengths.
• it absorbs and scatters blue light more than red. thus, red light can pass through it.
• If we place a star behind the dust, it will look more redder than its usual color. This is called interstellar reddening.
• Grains have a typical size of $10^-6 m$.

Thus, we can conclude that, Interstellar dust is effective at blocking visible light because dust grains are so small.

Learn more about the interstellar dust here:

https://brainly.com/question/28044836

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