HW#9: pg. 77 Rev 7 – 9; CST 7 – 9
Rev 7 – 9
7. How might we experience the Universe differently if the speed of light were much slower? Much faster?
8. Explain how light allows us to learn about distant astronomical objects.
9. If Earth were completely blanketed with clouds and we couldn't see the sky, could we learn about the realm beyond the clouds? What forms of radiation might be received?
CST 7 – 9
7. According to Wien's Law, the hottest stars also have (a) the longest peak wavelength; (b) the shortest peak wavelength; (c) maximum emission in the infrared region of the spectrum; (d) the largest diameters.
8. Stefan's law says that if the Sun's temperature were to double, its energy emission would (a) decrease by half its present value; (b) double; (c) increase by four times; (d) increase by 16 times.
9. A star much cooler than the Sun would appear (a) red; (b) blue; (c) smaller; (d) larger.