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Do you know what do cameras, eye glasses, telescopes and microscopes have in common? The object at the core of these devices is an optical lens. A lens is a transparent object and light is refracted when it passes through the lens. Lens is used in many optical instruments such as cameras, microscope, telescope, optical … Read more
This fun and interactive widget lets kids explore the world of sound by creating their very own sound waves! They can choose from four wave types—sine, square, triangle and saw tooth—each with its own unique sound and matching colorful animation. Using simple sliders, kids can adjust the frequency (how high or low the pitch of … Read more
In our daily life, we hear a lot of different sounds; sound of other people, sound of car, sound of water flowing, sound of different animals etc. Have you ever wonder how sound is generated and how do we hear it? How Sound Waves are formed? Let’s take a simple example. Throw a stone in … Read more
Binoculars are interesting devices that helps us in viewing distant objects with some level of magnification. It can be used for many things such as sporting events, star gazing, bird watching along with many different natural views. How it works? The below diagram shows the construction of a typical binocular: In order to understand the … Read more
Electricity is one of the most important inventions of our age. Our lives are heavily dependent on electricity. Whether it is lighting, home appliances, powering mobiles and computers, factories, transportation, in fact all sectors in some way rely on electricity. So what is electricity? Firstly it is a form of energy. It is produced when … Read more
We see different kind of colors all around us. But have you wondered what happens when different colors mix together? When two different colors mix together, they form an entirely new color. This is how artists, designers, and even scientists explore the world of colors. At the heart of color mixing are the primary colors … Read more
A microwave oven is useful device that helps in cooking delicious food for us. Have you wonder how it works? A microwave oven works by using microwave radiation to heat food quickly and efficiently. Microwave radiation As the name implies, it uses microwaves radiation to heat food. Microwave radiation is a type of electromagnetic radiation … Read more
You might wonder, if it really possible to lift things up without any visible support and that too in real world? The answer is yes but to a certain extent limited only due to current technological limitation. Before further explaining the answer, let’s first see how magnets work. If you observe a permanent magnetic in … Read more
A vacuum flask is an insulated bottle which helps to keep the liquid inside it at the same temperature at which it was added for an extended period of time. Also known as Thermos, it works by minimizing the heat transfer between the inside and outside environment. Sir James Dewar, a Scottish scientist, invented the … Read more
A compass is a tool which tells us the direction of North Pole of Earth’s magnetic field. Once you know the direction of North Pole, all other directions can be find out easily. Hence it is a useful tool for navigation and mapping. You can also use it for outdoor activities like hiking, sailing, trekking … Read more