This is an example of the logic fallacy called " post hoc ergo propter hoc", meaning roughly "after that, therefore caused by that". Another example: 99.99% of the people arrested for public drunkenness in the US last month had ice in their last three mixed drinks. Therefore, this is factual evidence that ice makes people drunk.
A light bulb converts electric energy into heat and light energy, but it is different when you are using solar energy.Not that different though, the solar energy turns into electric energy that converts into heat and light energy.
The focal point of a concave mirror is IN FRONT OF the mirror.
The Doppler Effect...
<span>It describes an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.</span>
This process is an example of chemical weathering