Physics in everyday life: electronic devices

iw_inundaweb
by iw_inundaweb 03 Mar

Despite being considered difficult, physics is present in almost everything we do in everyday life. It is in this aspect that experimental physics helps us to understand some things that we do not even imagine can have physical explanations.

A proof of this is the various activities that we perform and the devices we use that depend on certain phenomena to function.

Remote Control

Remote controls to control televisions, DVD players, video games, among others, use electromagnetic radiation for their operation. The equipment emits radiation in the infrared range, with a wavelength between 1 millimeter and 1 micrometer. By pressing the control buttons, it emits long and short pulses that represent a binary code, which is converted by the receiver. Each button corresponds to a specific code, which is represented by specific frequencies sent to the controlled equipment. When the device receive these signals, it decodes and performs the desired operations.

Microwave oven

Microwave ovens are also common in our homes. They work with electromagnetic radiation of frequency around 2.45 GHz. The water molecules contained in the body also oscillate in this frequency range. The water molecules contained in the body resonate with the electromagnetic radiation emitted by the oven and absorb the energy. Then, the heating and consequent cooking of the food or body occurs inside the oven. Cell phones also operate through the microwave, but with different frequencies and much lower power.

Computing

Computers, smartphones, tablets and other devices have among their components processes described by quantum physics, which studies systems on an atomic scale. They are responsible for processing the information and can transform the hundreds of gigabytes that are stored on hard disks into images, sounds, calculations, texts, etc.

These and a multitude of devices and phenomena are involved with physics. For example, lighting a light lamp, knocking over an object and even when something is stopped – inertia. How about putting all these phenomena into practice in an experimental physics class? Azeheb‘s range of products includes a number of essential laboratory equipment. Visit the site and check it out!

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