Present an introduction that gives an idea to the students of what the subject of the learning object is, and ask them about what they already know, to introduce the content. How would our lives be if we could not record all of our special moments? Many years ago, the moments we lived only remained in our memory. Nowadays, birthdays, weddings, school events, births, special visits, romantic moments, trips, etc., can last longer thanks to photography. Optical instruments make part of a human being’s everyday life. Observing microscopic cells and giant stars, looking at the sunrise, or capturing the image of a small bird; this is all possible thanks to the technological advances of this field. Throughout this learning object, you will learn more about light and its applications.