ASTR 1346 TEST 1 EXAM QUESTIONS
AND ANSWERS 100% PASS 2026/2027
What radiation has the shortest wavelength but greatest frequency? - ANS gamma rays
what radiation has the longest wavelength but least frequency? - ANS radio waves
order of electromagnetic spectrum - ANS gamma rays, x-rays, ultraviolet, visible, infrared,
microwave, radio
what radiation does not pass through the earth's atmosphere? - ANS gamma, x-ray, and most
uv and infrared
what radiation passes through the earth's atmosphere? - ANS visible and radio waves
continuous spectrum - ANS light with glass
absorption spectrum - ANS heated light source, cool gas, glass
2026/2027 ALLRIGHTS RESERVED 1
, emission spectrum - ANS heated gas, glass
what is the suns spectrum - ANS absorption due to its own atmosphere and that of the
earths which create that cool gas interference (hydrogen, helium, oxygen, iron)
sun's distance form earth - ANS 1.5X10^8 Km (150 million Km)
sun's mass - ANS 2x10^30 kg (333,000 X Earth's Mass)
sun's density - ANS 1400 kg/m3 (1/4 of Earths density)
sun's effective temperature - ANS 5800 K (surface temp)
sun's luminosity - ANS 3.85X10^26 watts
sun's axial tilt - ANS 7.25 degrees
sun's equatorial rotation period - ANS 25 days
sun's 60 degree latitude rotation period - ANS 31 days
sun's rotation period near the poles - ANS 36 days
sun's radius - ANS 700,000 km (109 times Earth's radius)
2026/2027 ALLRIGHTS RESERVED 2
AND ANSWERS 100% PASS 2026/2027
What radiation has the shortest wavelength but greatest frequency? - ANS gamma rays
what radiation has the longest wavelength but least frequency? - ANS radio waves
order of electromagnetic spectrum - ANS gamma rays, x-rays, ultraviolet, visible, infrared,
microwave, radio
what radiation does not pass through the earth's atmosphere? - ANS gamma, x-ray, and most
uv and infrared
what radiation passes through the earth's atmosphere? - ANS visible and radio waves
continuous spectrum - ANS light with glass
absorption spectrum - ANS heated light source, cool gas, glass
2026/2027 ALLRIGHTS RESERVED 1
, emission spectrum - ANS heated gas, glass
what is the suns spectrum - ANS absorption due to its own atmosphere and that of the
earths which create that cool gas interference (hydrogen, helium, oxygen, iron)
sun's distance form earth - ANS 1.5X10^8 Km (150 million Km)
sun's mass - ANS 2x10^30 kg (333,000 X Earth's Mass)
sun's density - ANS 1400 kg/m3 (1/4 of Earths density)
sun's effective temperature - ANS 5800 K (surface temp)
sun's luminosity - ANS 3.85X10^26 watts
sun's axial tilt - ANS 7.25 degrees
sun's equatorial rotation period - ANS 25 days
sun's 60 degree latitude rotation period - ANS 31 days
sun's rotation period near the poles - ANS 36 days
sun's radius - ANS 700,000 km (109 times Earth's radius)
2026/2027 ALLRIGHTS RESERVED 2
