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Science Bowl Question

📅 MIT Science Bowl Invitational 2020🎓 HS🔄 Round 10#️⃣ Question 13 TOSS UP📝 Multiple Choice

Which of the following is true of interstellar reddening?

W) It causes spectral lines to shift towards longer wavelengths
X) It is caused by preferential scattering of shorter wavelengths of light
Y) It occurs only in dark nebulae
Z) It is responsible for the decrease in observed magnitude of faraway stars
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