Stella Academy

electronics Module

Interactive Simulation Screen

SYS_OK

Lesson Directive // Frequency & SignalsREF_CORE

\lambda

=

v

f

Hover over a variable in the formula above, or see glossary below:

\lambda

Wavelength

Meters (m)

v

Wave Velocity

m/s

f

Frequency

Hertz (Hz)

Signals, from sound to radio waves, travel as oscillating fields or pressures. A sine wave is the purest form of oscillation.

INSIGHT: Frequency measures how rapidly the wave oscillates.

Waves travel at a specific speed depending on the medium. In a vacuum, radio waves and light travel at approximately 300,000 km/s (c).

INSIGHT: Wave speed connects time (frequency) to space (wavelength).

Because the speed of light is constant, higher frequency waves must have shorter wavelengths. They are inversely proportional.

INSIGHT: High frequency = short wavelength. Low frequency = long wavelength.

●Telemetry Control Console

CAL_SYS

Adjust Simulator Parameters

Frequency:2 Hz

Amplitude:35 px

Syllabus Worked Example

Q: Find the wavelength (\lambda) of a radio wave transmitting at f = 100 MHz (10^8 Hz).

1.Note the speed of light v = c \approx 3 \times 10^8 m/s.

2.Use the formula: \lambda = \frac{v}{f}.

3.Substitute the numbers: \lambda = \frac{3 \times 10^8}{10^8}.

Result:\lambda = 3.0 \text{ meters}