In many ways, a magnifying glass works just like a human eye because it allows light to pass through it and then bends it accordingly. Magnifying lenses take parallel light rays in, then refracts it, so that they all converge as they exit. You might not have realized it, but magnifying glasses have greatly helped us understand and enjoy the world around us. Established in , Action Glass Co.
We have the experience and expertise to get the job done right the first time. Figure III. As usual, angles are small and the lens is thin. The object is in the focal plane of the lens. I draw two rays from the tip of the object. One is parallel to the axis, and, after passing through the lens, it passes through the focus on the other side of the lens. The other goes through the center of the lens. Since the lens is thin, this ray is not laterally displaced. Parallel rays emerge from the lens.
The eye is immediately to the right of the lens, and it easily brings the parallel rays to a focus on the retina. The angular magnification of a magnifying glass is therefore defined as. Keep in mind that keep the dot size as small as possible in order to create the fire sooner. Slowly you can observe some smoke from the focused area. Then the fire comes slowly after smoke appears. My kids focused on eyes and mouth part of the smiley face they have drawn on the white paper.
They were amazed seeing the fire using magnifying glass. They enjoyed peeping out of the eyes of the smiley face as they made holes by creating fire with the lens glass. They hugged and thank me for showing them such a wonderful act. We even went to our garden to try out with dried leaves. It worked so fool-proof that leaves in our garden started burning.
Trust me, no exaggeration. The dried leaves lying around caught fire. I stopped there but was really feeling awesome by the way it worked. You need a magnifying glass which can be purchased but they are not expensive. Be very careful on a sunny day to prevent any accidents. Ensure not to leave the glass outside without knowledge. Also, do not allow kids to handle alone.
The Science Behind It The unique properties of magnifying glass is the magic trick behind creating a fire using magnifying glass. Wondered to know what those unique properties are!!? Let us begin. We already learned about what is magnifying glass and how it makes things look bigger. Coming to our experiment, the science behind creating a fire using magnifying glass is found in the form of photons. Photons are just the particles that carry or holds the clear visible light from the sun to the earth.
They transmit light and energy in the form of heat. A magnifying glass sets fire by focusing all the photons through the small dot area created by the convex curved outward lens. When the sun fall on the magnifying glass, the appropriate focal strength of the photons passes through the lens and creates a small sized dot on the ignitable material. This generates an extremely high heat concentration at the dot area which is good enough to start a fire.
This is time taking process and you need to wait until the sun light catches fire. The convex lens can be found in many devices we are aware of. Ex: binoculars, camera, even glass bottle bottoms etc. Tisha was 3 years old when I tried this experiment. You can teach kids about making a fire in your garden with this experiment. Let me warn you to take care of kids. Please make sure if your kid is appropriate to take part in this experiment.
However, I know that my kids will not overboard on things and will check with me. Also, I will explain to them about the hazards caused in advance. Hence I am very confident to do any experiment with my kids. I will also tell them few conditions and only if they abide by we will do that particular work.
It is easy to handle my little ones. You can also ensure safety before starting not only this activity but others too posted in this site. Yes, we can create the fire using any type of glasses that have convex lens. All you need to create a fire is convex lens to focus the sun light to a small area or specific spot.
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