UV rays
yes
Infrared light does not typically cause sunburns. Sunburns are usually caused by overexposure to ultraviolet (UV) radiation from the sun. Infrared light is experienced as heat, and is not known to cause skin damage in the same way that UV radiation does.
The blue component of incoming sunlight is scattered much more than any other color component when sunlight passes through Earth's atmosphere. This scattering is caused by the smaller blue wavelengths of light being scattered in all directions by air molecules and other particles in the atmosphere, resulting in the sky appearing blue to our eyes.
Sunburn is caused by UV-radiation from the sun which creates direct DNA damage.
A burn on the skin caused by excessive exposure to the sun or other sources of ultraviolet-A and -B radiation.
If you get at least 3 serious sunburns before the age of 20 there is an possibility that you will get skin cancer.
I don't think so. Ulcers are generally caused by the bacteria H. pylori.
Yes, you can get sunburns on cloudy days. Sunburns are caused by ultraviolet rays, which are not blocked by clouds, only by sunscreen. Sunburns are usually worse on cloudy days because people do not realize they can get burned and do not wear enough sunscreen.
The infrared radiation component of sunlight is responsible for creating heat when it comes into contact with an object. This radiation is absorbed by the object, causing its molecules to vibrate and generate heat.
Rainbow
Ultraviolet rays from the Sun cause sunburns.
A rainbow is caused by the refraction, reflection, and dispersion of sunlight in water droplets in the atmosphere. When sunlight enters a raindrop, it bends and splits into its component colors, creating the arc of colors we see in a rainbow.