Light Can Be Reflected

Have you ever observed objects around you? Why are these objects can be seen by our eyes?. They may be seen by our eyes because of the light reflected from the object towards the eye. The symptoms are related to the presence of light or light reflection. Try to shine a flashlight into the dark walls of your room. You will see the light of a flashlight or irregular diffuse reflected by the wall. Why is that?

Now do the following activities in front of the mirror. Look at yourself in the mirror. You can look in the mirror because the light coming from yourself reflected in the mirror, then the mirror is reflected back to the eye. This is one of the properties of light that light can be reflected if it relates to a surface. Regular reflection, reflection on the surface of the object / objects are flat reflection as in a mirror, so that the reflected rays are parallel and regular.

Diffuse Reflection term meaning irregular reflection, reflection on the reflection surfaces are uneven, so that the reflected light reflected off all directions and irregular.

The mirror is an object that reflects light. Based on existing flat mirror surface shape and curved mirrors. Curved mirrors are of two kinds, namely convex mirror and concave mirror.

a.     Flat mirror

Flat mirror surface is mirror that have flat reflective field and not curved. You usually use flat mirrors to reflect. At the mirror, you'll see your shadow in the mirror. How to shade yourself in the mirror? is it same?

When you reflect on, you can see that the shadow on a flat mirror has the following properties:

1) Size (big and tall) equal to the size of the shadow object.

2) Distance to a mirror reflection equals the distance of objects in the mirror.

3) The appearance of a shadow against the object. For example, your left hand will be the right-hand shadow.

4) The image of the object upright.

5) The image is false or virtual. That is, the shadow can be seen in the mirror, but can not be captured by the screen.

b.     Convex mirror

Convex mirror surface is mirror that have reflective field curved outwards. Convex mirror is used to spy on motorists. The shadow on the convex mirror is virtual, erect, and smaller (reduced) than the real thing.

c.      Concave mirror

Concave mirror is a plane mirror that have reflective field curve inside. Concave mirror is usually used as a reflector in the headlights danlampu flashlight.

The nature of the shadow object formed by a concave mirror depends on the location of the object to the mirror.

1)   If the object is close to the concave mirror, the image of the object is upright, more
large, and the apparent (virtual). 

2) If the object away from a concave mirror, the image of the object is real (true) and reversed.

From the disscusion above, we conclude that every object can be seen by our eyes because there is reflection of light.