* The sun emits a wide spectrum of radiation: This includes visible light (what we see as colors), as well as infrared (heat), ultraviolet (which causes sunburns), and other types of radiation.

* All these rays are invisible to the naked eye: We can't see infrared or ultraviolet radiation, but they are still present and can have significant effects.

* Some rays are blocked by the atmosphere: Our atmosphere filters out some harmful radiation, like most of the ultraviolet rays.

So, instead of "invisible sun rays," it's more accurate to refer to specific types of radiation from the sun:

* Infrared radiation: This is what we feel as heat.

* Ultraviolet radiation: This can cause sunburns and skin cancer.

* X-rays and gamma rays: These are high-energy radiation that are mostly absorbed by the Earth's atmosphere.

Remember, even though we can't see all the radiation from the sun, it's important to be aware of its effects and take precautions when necessary.