Question

Question 16 (1 point) Saved Visible light has wavelengths ranging between approximately 4000 and 7000 Angstroms ( 400 to 700 nanometres ) . Which of the following statements is true regarding the surface temperature of a star for which the wavelength of maximum intensity falls in the visible range ? Question 16 options: It could never be cooler than 8000 K It must always be cooler than 5500 K It must lie between 8000 K and 5500 K It must always be hotter than 3500 K Which of the following is closest to the distance from Earth to a star having an Absolute Magnitude of -1 and an apparent Magnitude of 2.5 ? Question 18 options: 150 parsecs 100 parsecs 50 parsecs 25 parsecs Question 13 (1 point) Saved Which of the following is closest to the Absolute Magnitude of a star having a luminosity of 150 times the luminosity of the Sun ? Question 13 options: 0.0 -1.0 1.0 -2.0

Answer 1

Question number 16)