Physics

Replies / Views	Last post
Star A and star B have the same temperature, but different luminosities. What ca Started by futuristic	1 Replies 537 Views	Aug 28, 2013 by curlz
Star A has a temperature 1/2 that of star B, but star A is 5 times bigger than s Started by futuristic	1 Replies 646 Views	Aug 28, 2013 by curlz
According to Wein's Law, if the surface temperature is increased by a factor of Started by futuristic	1 Replies 560 Views	Aug 28, 2013 by curlz
What is true of a blackbody? A) It appears black to us, regardless of its temper Started by futuristic	1 Replies 732 Views	Aug 28, 2013 by curlz
Which type of radiation can be observed well from Earth's surface? A) gamma ray Started by futuristic	1 Replies 813 Views	Aug 28, 2013 by curlz
The radiation our eyes are most sensitive to lies in the color A) red at 6563 An Started by futuristic	1 Replies 751 Views	Aug 28, 2013 by curlz
There are no radio telescopes in space because A) no one has built an antenna la Started by futuristic	1 Replies 622 Views	Aug 28, 2013 by curlz
There are no X-ray telescopes on Earth because A) they are too expensive to buil Started by futuristic	1 Replies 498 Views	Aug 28, 2013 by curlz
Colors appear different to us because of their photons' different: A) speeds. B) Started by futuristic	1 Replies 1,010 Views	Aug 28, 2013 by curlz
The visible color of electromagnetic radiation that has the shortest wavelength Started by futuristic	1 Replies 621 Views	Aug 28, 2013 by curlz
Electromagnetic radiation with a wavelength of 700 nm would be: A) X-rays. B) re Started by futuristic	1 Replies 589 Views	Aug 28, 2013 by curlz
X-ray telescopes are located in orbit around the Earth because A) X-ray telescop Started by futuristic	1 Replies 561 Views	Aug 28, 2013 by curlz
The hottest objects with temperatures in the millions of degrees Kelvin, give of Started by futuristic	1 Replies 1,106 Views	Aug 28, 2013 by curlz
The two forms of electromagnetic radiation that penetrate the atmosphere best ar Started by futuristic	1 Replies 598 Views	Aug 28, 2013 by curlz
A wave's velocity is the product of the A) frequency times the period of the wav Started by futuristic	1 Replies 590 Views	Aug 28, 2013 by curlz
The number of waves passing the observer per second is: A) the wavelength in ang Started by futuristic	1 Replies 603 Views	Aug 28, 2013 by curlz
If a wave's frequency doubles, its wavelength A) is halved. B) is also doubled. Started by futuristic	1 Replies 513 Views	Aug 28, 2013 by curlz
Both sound waves and electromagnetic radiation A) travel at the speed of light. Started by futuristic	1 Replies 687 Views	Aug 28, 2013 by curlz
What does the phenomenon of diffraction demonstrate? A) the wave nature of light Started by futuristic	1 Replies 1,852 Views	Aug 28, 2013 by curlz
What does the phenomenon of interference demonstrate? A) the wave nature of ligh Started by futuristic	1 Replies 1,040 Views	Aug 28, 2013 by curlz
Which of these is constant for ALL types of electromagnetic radiation in a vacuu Started by futuristic	1 Replies 696 Views	Aug 28, 2013 by curlz
Which statement gives the relationship between the waves in the electric and mag Started by futuristic	1 Replies 598 Views	Aug 28, 2013 by curlz
Electromagnetic radiation A) can only travel in a dense medium. B) has only the Started by futuristic	1 Replies 591 Views	Aug 28, 2013 by curlz
The temperature scale that places zero at the point where all atomic and molecul Started by futuristic	1 Replies 712 Views	Aug 28, 2013 by curlz
Which form of electromagnetic radiation is absorbed by carbon dioxide and water Started by futuristic	1 Replies 539 Views	Aug 28, 2013 by curlz