What type of electromagnetic energy is invisible to the human eye?

Answer 1

Any electromagnetic energy that is smaller than 400 nanometres or larger than 700 nanometres.

The electromagnetic spectrum is vast, ranging from the smallest Gamma waves at #10^-6# nanometres, to the largest radio waves at 100 km. Out of this whole spectrum, our eyes have only evolved to see a tiny, 300-nanometer range of it all. This range is between 400-700 nanometers and includes every single color we can see with our naked eye.

Just above our view is the infra-red section, and just under is ultra-violet. Why our eyes only evolved to see such a small part of the spectrum, I don't know. But thanks to this, Any electromagnetic energy that is smaller than 400 nanometers or larger than 700 nanometers is invisible to the human eye.

I hope that helped!

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Adrian Ayala

The type of electromagnetic energy that is invisible to the human eye includes ultraviolet (UV) radiation, infrared (IR) radiation, microwaves, and radio waves.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.