Electromagnetic Wave and Spectrum Theory

Electromagnetic waves and spectrum

2. Disturbance in a field that carries energy and
does not require a medium to travel.

3. Electromagnetic waves
Mechanical waves

4. Formulated the ELECTROMAGNETIC WAVE
THEORY-which says that an oscillating
electric current should be capable of radiating
energy in the form of electromagnetic waves.
CONTRIBUTED IN DEVELOPING EQUATIONS
SHOWING THE RELATIONSHIP OF ELECTRICITY
MAGNETISM.

5. Discovered the HERTZIAN WAVES-known as
RADIO WAVES
HERTZ –is the unit used to measure the
frequency of waves.
Showed experimental evidence of
electromagnetic waves and their link to light.

6. DEMONSTRATED THE MAGNETIC EFFECT
BASED ON THE DIRECTION OF CURRENT.

7. FORMULATED THE PRINCIPLE BEHIND
ELECTROMAGNETIC INDUCTION.

8. SHOWED HOW A CURRENT CARRYING WIRE
BEHAVES LIKE A MAGNET.

9. Most EM waves are invisible to the human eye
but detectable.
Only the visible light is seen by humans.

10. Electric fieldsare generated around particles
that bear electric charge. Positive charges are
drawn towards it, while negative charges are
repelled.
The area around a magnet within which
magnetic force is exerted, is called a MAGNETIC
FIELD.

12. Can travel through a vacuum
Travel at the speed which is constant = c=
3.0x10⁸ m/s in vacuum
Disturbances in the field rather than in a
medium
Have an electric field that travels
perpendicular with the magnetic field.
Form when moving charged particles transfer
energy through a field.

13. A changing magnetic field produces an
electric field.
A changing electric field produces a magnetic
field

14. EM waves have the same speed and equal to
the speed of light
As wavelength decreases, the frequency of
the waves increases.

15. Electromagnetic waves transfer energy
through a vacuum/
A wave is a disturbance that transfers energy
Most EM waves are invisible and
undetectable.

16. Is a continuum of electromagnetic waves
arranged according to frequency and
wavelength.
It is gradual progression from the waves of
lowest frequencies to the waves of highest
frequencies.