The absorption of light by blood experiment – an experiment with blood and colored lights.

The absorption of electromagnetic radiation happens all around us. In fact, this absorption process is the cornerstone for many modern-day technologies. Absorption of electromagnetic radiations allows the conversion of solar energy into electricity. The absorption of microwave electromagnetic radiation is what makes radars work. And our bodies absorb electromagnetic radiation too. Certain frequencies are absorbed easier by our bodies than others. In this experiment, we will demonstrate the body’s absorption of a common frequency range of electromagnetic radiation – visible light. In a darkened room, we will hold a red LED flashlight to our thumb. The thumb will glow bright red indicating much of the light passed right through our thumb. When we hold a green LED flashlight to our thumbs however, almost all of the light

Things aren’t always as they appear – light refraction experiment

Experiment to demonstrate the principle of refraction Ever reached down into the bath tub water to grab a toy and found that it was not in the position it appeared to be in? What you are experiencing is the effect called refraction. When light enters the water (or any transparent material) it slows down slightly. If the light enters the water at an angle then this change in speed causes the light beam to bend away from its original path. This is called refraction. Let's conduct an experiment that allows us to see the effect of refraction. Fill the glass 2/3 full of water. Place the pencil in the glass holding it straight up and down (i.e. not at an angle). Notice that the pencil still appears

Fooling Around with your Mind

Using mirrors to confuse your brain (and Dad) Our eyes see everything going on around us.  The eyes then send this information to our brain which then interprets the information they are given.  Sometimes the brain has to fudge a little when making these interpretations.  This is especially true when our eyes see something that the brain knows cannot be true.  In cases like this, the brain interprets the information the best it can and may end up feeling a little bit confused... Have Dad leave the room.  Don't say we didn't warn you. Glue the two mirrors together, back to back.  Be very careful not to cut yourself on the mirrors.  If the edges of the mirrors are too sharp, you may want to apply tape to

Eyes in the back of your head

Build a homemade periscope Parents have eyes in the back of their heads – we all know that.  They always know what you’ve done, where you did it, and sometimes even why you did it.  We’ll never fully understand how they do this; even science cannot provide an explanation of this natural phenomena.  But, this experiment can at least put you on somewhat equal ground as we create a gadget that will literally let you see around corners… Cut off the angled top of the milk cartons so each carton has a squared off, open end. On the closed end of the carton, cut a small square hole on one of the sides.  Leave about ¼ inch of carton on each side of the hole.  This hole will

Create an oven using a pizza box

Experiment to create a real oven using a pizza box Does you family head to the kitchen table every time they hear a fire siren? Do you get even with the neighborhood bully by inviting him over to dinner? Does Dad refer to the fire detector as the “oven timer”? It sounds like your family might need cooking lessons. Well Reeko can’t (or won’t) provide cooking lessons but he sure knows how to make a cool little oven – out of a pizza box! And while we’re at it we’ll learn how thermal collectors are able to collect sunlight and convert the solar radiation into heat. The sun is an ultimate form of energy and it has produced that energy for billions of years. Solar energy, or

An enlightening experiment

Using a mirror to check out the properties of light Light traveling in a straight line appears colorless. But there's more to light than just colorless nothingness. When light passes through a wedge shaped piece of glass called a prism, the light is separated into 7 different and unique colors. You see these colors when light passes through rain or moisture producing a rainbow. Place a mirror in the glass of water at an angle (let it lean against the side of the glass). Turn the glass so the mirror is facing the sun. Hold the paper at a slant in front of the glass. Move the paper around until you see the rainbow colors. You may need to move the paper around slightly until the colors come into