If you were standing near an Electric Arc Furnace when the steel is poured, you would feel pretty hot. This is because the hot furnace is sending out infra red radiation. This is part of the electromagnetic spectrum - with a wavelength slightly longer than visible light.
When the infra red radiation hits your face or hands, it is absorbed and warms you up. The hotter the molten steel, the more intense the radiation and the hotter you will feel.
Picture 9. The house looks bright and white because it scatters so many visible light rays. It also scatters the infra red rays and therefore stays cool inside.
The Sun is like a huge, extremely hot, furnace out in space. We rely on it to keep the Earth warm. However, space is a vacuum so it cant heat us up using conduction and convection. Instead, the energy is carried from the Sun by infra red radiation which can travel through a vacuum.
Often we want to protect ourselves from radiation (including the Suns rays). We can do this by wearing white or shiny clothing. In hot countries, people paint their houses white to keep them cool inside.
The infra red radiation bounces off a white surface in the same way that light is reflected. So the shiny surface stops the radiation being absorbed.
On the other hand, dull, black surfaces will absorb lots of radiation. They look black because no light is scattering off their surface - it is all absorbed. Similarly, they absorb infra red radiation, which warms them up.
Solar panels are painted black so that they absorb the infra red radiation from the Sun.