Recent content by cognaq

Thank you for your detailed response. I was looking for isolated sodium lamps, but could find none so far that would be in an otherwise light-free environment. I will definitely try this out with some coloured source of light if I find one. In practice, I assume, absorption is imperfect and a...

Hey Simon Bridge! Thank you for your quick response. I reasoned under the wrong assumption that the absorption spectrum was bell-shaped around the dominant colour. That is very good to know! A further question arises for me. Assume I shine red light on a green surface in a room where there is...

I have observed the following phenomenon: When I shine coloured light (say red) on a surface that has its complementary colour (in this case green) it becomes significantly less saturated (even to the point of becoming completely desaturated, i.e. grey). I had no opportunity to try this out in...

Thank you guys for you quick responses. You helped me in some way, but I find it too difficult because of the rotational energy and the rotational friction coefficient, so I decided to rearrange the experiment a little bit (I am going to use blocks, and try to calculate the \mu). I am going to...

[I am new to this forum and I am sorry if posted this in the wrong topic.] I just wondered if you could help me with the following (I know it's long :-( ): I had the idea of calculating g (gravitational force) on Earth using a marble (spherical) and a slant board (a hard board that is tilted...