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Why is the sky blue?

The Earth's atmosphere scatters incoming light from the sun. This incoming light is made up of lots of different colours. Each colour of light has a different wavelength and because of this, different colour...
HS
Answered by Hector S. • Physics tutor
2479 Views

What are the three major radiations experienced by heavy unstable nuclei, and how does the penetrating power compare for each?

α - Emission of a Helium nucleus, it has the highest mass and lowest energy of the three types of radiation, it has a +2 overall charge due to its 2 neutron - 2 proton makeup, and can penetrate up to a few s...
RL
Answered by Ryan L. • Physics tutor
2408 Views

What is meant by 'resolving a vector into its components'?

So, let's think of a vector as an 'instruction' - a guide telling us to move in a specific direction for a certain distance. (Draw arbitrary vector A here). This is not the only way to move this distance awa...
JR
Answered by John R. • Physics tutor
3378 Views

In the photoelectric effect, why is the kinetic energy of the electrons independent of the intensity of light?

In our situation, the stopping potential doesn’t let any electron to pass. When we increase the frequency of incident light, the electrons get more energy. We know it from equation E=hf. When electrons gain ...
RK
Answered by Rafal K. • Physics tutor
9483 Views

How does heat transfer through convection work?

Convection is transfer of energy through movement of liquid particles. Let us take some steps back and revise a number of principles. First of all, you should remember the concept of density. If two parts of...
AM
Answered by Alireza M. • Physics tutor
2943 Views