The apparent surface of the Sun is the visible outer layer of the Sun that we see from Earth. It is also known as the photosphere and has a temperature of about 5,500 degrees Celsius.
The apparent surface of the Sun is the layer that emits visible light, while its actual surface is much hotter and is where nuclear fusion takes place. The actual surface, also known as the core, has a temperature of about 15 million degrees Celsius.
The apparent surface of the Sun appears yellow or orange to us because of the Sun's surface temperature. As the temperature increases, the color of light emitted shifts towards the yellow end of the spectrum. Additionally, the Earth's atmosphere also plays a role in the color we see.
The apparent surface, or photosphere, is about 500 kilometers thick. This may seem like a lot, but compared to the overall size of the Sun (nearly 1.4 million kilometers in diameter), it is relatively thin.
Yes, we can see various features on the apparent surface of the Sun, such as sunspots, prominences, and solar flares. These features are caused by magnetic activity on the Sun's surface and can be observed with special equipment, such as telescopes with solar filters.