Electromagnetic Waves in Free Space Video Lecture | CSIR NET Crash Course for Physical Science - CSIR NET Physical Science

1. What are electromagnetic waves in free space?$#
Ans. Electromagnetic waves in free space are waves that do not require a medium to propagate. They consist of oscillating electric and magnetic fields that travel through vacuum at the speed of light.

2. How do electromagnetic waves in free space differ from other types of waves?$#
Ans. Electromagnetic waves in free space differ from other types of waves, such as mechanical waves, in that they do not require a medium for propagation. They can travel through vacuum and do not rely on particles to transfer energy.

3. What is the relationship between the electric and magnetic fields in electromagnetic waves in free space?$#
Ans. In electromagnetic waves in free space, the electric field and magnetic field are perpendicular to each other and oscillate in phase. This means that as the electric field changes, so does the magnetic field, and vice versa.

4. How are the frequency and wavelength of electromagnetic waves in free space related?$#
Ans. The frequency and wavelength of electromagnetic waves in free space are inversely proportional. This means that as the frequency increases, the wavelength decreases, and vice versa. This relationship is described by the equation: speed = frequency x wavelength.

5. What are some applications of electromagnetic waves in free space?$#
Ans. Electromagnetic waves in free space have numerous applications, including communication technologies like radio, television, and cell phones. They are also used in medical imaging (such as MRI), remote sensing, and astronomy.