Проекты

Electromagnetic waves and their properties

Работа призёра открытой городской научно-практической конференции «Курчатовский проект: от знаний к практике, от практики к результату» в секции «Мастер-класс на иностранном языке» среди работ учащихся 10-11 классов

Направление работы: Волновая физика
Авторы работы: Школа № 438
Предметы: Физика
Классы: 11 класс
Мероприятия: Открытая городская научно-практическая конференция «Курчатовский проект: от знаний к практике, от практики к результату» 11 апреля 2018 года

Введение

When electromagnetic waves propagate, one can observe reflection, absorption, and diffraction. Due to these properties, electromagnetic waves are widely used in various fields of human activity such as radiotelephone communications, television, medicine, electrical engineering and space equipment.

An electromagnetic wave is propagation in the medium of electromagnetic oscillations, originally emerging at some point of space.

Electromagnetic oscillations are periodic changes in the time of voltage and induction.

Electromagnetic vibrations are radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Цель

We would like to conduct a series of experiments illustrating their various properties and practical applications.

Описание

1. Transmission and reception of electromagnetic waves. Absorption.

In this experiment, the radiation and reception of electromagnetic waves are demonstrated and the possibility of their use for information transmission is shown.

2. Reflection of electromagnetic waves.

The purpose of this experiment is to demonstrate the phenomenon of reflection of electromagnetic waves. According to the law of light reflection off a plane mirror, the angle of reflection of a ray off a mirror is equal to the angle of incidence. An aluminum plate is used in the experiment as a mirror.

3. Diffraction of electromagnetic waves from a slit.

The purpose of this experiment is to demonstrate the diffraction of electromagnetic waves from a narrow slit.

4. Diffraction of electromagnetic waves on a narrow screen.

The purpose of this experiment is to demonstrate the absence of a shadow behind an obstacle whose dimensions are approximately 2 wavelengths (the wavelength of the electromagnetic radiation used in this set is 2.7 cm).

Оснащение и оборудование, использованное в работе

An emitter of EM-waves, a receiver-amplifier, a set of metal screens, an EM-wave sensor, an EM-wave sensor plate, a set of plane-parallel plates, a set of fasteners and supports for screens and prisms, a digital voltage sensor.