# Physics - Electromagnetic Waves

> Source: https://ollybritton.com/notes/a-level/physics/topics/electromagnetic-waves/ · Updated: 2021-03-25 · Tags: physics, waves, school, year-1

## See Also
## Flashcards
##### What has the longest wavelength on the electromagnetic spectrum??
Radio waves

##### What has the shortest wavelength on the electromagnetic spectrum??
Gamma rays

##### What is the range of wavelengths for visible light??
$$
380nm \text{to} 740nm
$$

##### What is the speed of an electromagnetic wave in a vacuum??
$$
3 \times 10^8 m/s
$$

##### What do electromagnetic waves consist of??
Oscillating magnetic and electrical vibrations at right angles to one another.

### 2021-03-30
##### What is roughly the wavelength of radio waves??
$$
1m
$$

##### What is roughly the wavelength of microwaves??
$$
1cm
$$

##### What is roughly the wavelength of infrared waves??
$$
10\mu m
$$

##### What is roughly the wavelength of visible light??
$$
500nm
$$

##### What is roughly the wavelength of ultraviolet light??
$$
0.1 \mu m
$$

##### What is roughly the wavelength of X-rays??
$$
1nm
$$

##### What is roughly the wavelength of Gamma rays??
$$
10^{-13} m
$$

---
Olly Britton — https://ollybritton.com. Machine-readable index: https://ollybritton.com/llms.txt