The temperature and brightness of stars are shown on the
bright-temp graph
h-r diagram
star model
luminosity grid

Therefore, The temperature and brightness of stars are shown on the H-R Diagram.

Explanation:

A star’s brightness, or luminosity, depends on the star’s surface  temperature and size.

If two stars have the same surface temperature, the larger star will be more luminous.

The Hertzsprung-Russell (H-R)  diagram below is a scatter plot that shows the relative  temperatures and luminosity of various stars.

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

photocells convert light energy to electricity