http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/ Travel journey planner tourist destinations and backpacking prepare saving money on travelling Mon, 16 Apr 2012 03:15:59 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/comment-page-1/#comment-1141 Prof. Zikzak Mon, 22 Dec 2008 13:15:17 +0000 http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/#comment-1141 All observers observe all light rays to travel at c. The torch works exactly the same regardless of your motion. All observers observe all light rays to travel at c. The torch works exactly the same regardless of your motion.

]]> http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/comment-page-1/#comment-1140 D_Barber Sat, 20 Dec 2008 19:56:41 +0000 http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/#comment-1140 According to relativity, the light will appear to race away from you at the speed of light. Some one watching you from the earth, would see you travelling fairly close to the front of beam near the speed of light. The key is that time for you changes so that both statements seem true - the famous analogy of your clock being slower so the distance travelled by your flashlight beam in a 'second' is the same distance as if you were relatively still (with faster relative time). According to relativity, the light will appear to race away from you at the speed of light. Some one watching you from the earth, would see you travelling fairly close to the front of beam near the speed of light. The key is that time for you changes so that both statements seem true – the famous analogy of your clock being slower so the distance travelled by your flashlight beam in a ‘second’ is the same distance as if you were relatively still (with faster relative time).

]]> http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/comment-page-1/#comment-1139 hylobius Sat, 20 Dec 2008 15:05:33 +0000 http://imhar.info/physics/if-you-are-travelling-just-below-the-speed-of-light-and-you-shine-a-torch-in-front-of-you-what-happens/#comment-1139 according to Einstein's theory of relativity, the speed of light is a constant, so it would appear to move slower if you shined it in front of you, and faster if you shined it behind. This would also change the apparent color of the light to you as the observer (sort of like the doppler effect, but here it's the thing in motion that is affected). according to Einstein’s theory of relativity, the speed of light is a constant, so it would appear to move slower if you shined it in front of you, and faster if you shined it behind. This would also change the apparent color of the light to you as the observer (sort of like the doppler effect, but here it’s the thing in motion that is affected).

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