1. One star has a temperature of 10,000 K and another star has a temperature of 5000 K Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?
16 times
2 times
1´1016 times
625 times
6.3´1014 times
2. The Sun, which is a 5800K object is emitting mostly:
infrared light
red light
green light
blue light