dr hab. inż. Mariola Buczkowska

Alumna of the Faculty of Technical Physics, Information technology and Applied Mathematics. Academic teacher in the Institute of Physics. Mamber of the Polish Liquid Crystal Society.

Can you see the contents of the suitcase without opening it? The immediate answer is yes - it needs X-rays. However, as ionizing radiation, they have a detrimental effect on living organisms, which limits their use. There is, however, another way to look inside the suitcase. You have to use a special kind of "light".

Normal", that is visible light, is a type of electromagnetic wave. The distinguishing feature of each wave is its length or frequency.

The lens is an important element of the eye of mammals, birds, reptiles, amphibians, and fish. It allows one to see objects located at different distances clearly. It is possible because images are formed on the retina - another important part of the eye. Clear images are achieved by changes in the shape of the lens.