Why do sunbeams appear to spread out? | Science Questions
Oct 25, 2011 · The Sun's rays are not issuing from behind a cloud and spreading out towards you: the Sun is so far away that the light rays reaching the Earth are effectively parallel. Instead, …
How does a white surface reflect light? | Science Questions
Apr 13, 2008 · When they're reflected, basically the wiggle the wavelength imparts to the material creates another light wave of the wavelength of the colour that you see. That's why it reflects …
How do we know that the sun rotates on its own axis?
Jun 13, 2017 · So he tracked how those progressed across the disc of the Sun and worked out the Sun rotated about every four weeks. However, it isn’t a solid body. So, even though the …
What Shaped the Surface of Mars? | Interviews - The Naked …
May 25, 2008 · That's where material just breaks off and falls down the slope in response to gravity. People have difficulty with that because the morphology is not quite the same. The …
How do Thunderstorms and Lightning Work? | Science Features
Jun 3, 2007 · Each lightning flash is about 3 miles long but only about a centimetre wide. It discharges about 1-10 billion joules of energy and produces a current of some 30,000 - 50,000 …
What loses heat fastest, a white or black surface?
Sep 4, 2011 · If it is absorbed, the substance looks black. If it isn't, it's white [because the light is reflected back]. This means that, if you heat something up, if there's [a higher energy level] …
Why would it take so long for light to leave the Sun?
Jun 22, 2008 · Answer. Yes. There's a reason for saying that. The reason is that Brian Fulton, who's Professor of Astrophysics at York told me that. So I know it's right! The reason is that …
Can the Sun affect Earth weather? | Interviews - The Naked Scientists
Jan 20, 2014 · Joanna - No, it's not. So, those solar storms affect a very, very high atmosphere of the Earth. But when we're talking about climates, we're more interested in the sun's …
How long does it take for heat to reach us from the sun?
Feb 22, 2009 · The distance to the Earth from the sun is defined as 1 astronomical unit (AU). The distance to the nearest star is approximately 267000 AU. Taking these two facts into account, …
Why does the sun warm us up on earth but remains cold at higher ...
Nov 1, 2009 · The reason why that's very cold is because if you have pockets of air which is being warmed up on the surface of the Earth and then it lifts up by convection, it's moved upwards, …