Question

Name the electromagnetic radiations and write their frequency range:
(a) Used to take the photograph of the bones
(b) Produced by hot bodies
(c) Used in television communication systems

Hint:

Different regions of the electromagnetic spectrum serve distinct practical purposes: - X-rays: Imaging dense structures like bones.
- Infrared: Heat detection and remote controls.
- Radio waves: Communication over long distances.

Answer 1

(a) X-rays Frequency range: \( 3 \times 10^{16} \text{ Hz to } 3 \times 10^{19} \text{ Hz} \)
Used in medical imaging to photograph bones due to their penetrating power. \medskip (b) Infrared rays Frequency range: \( 3 \times 10^{11} \text{ Hz to } 4.3 \times 10^{14} \text{ Hz} \)
Infrared radiation is emitted by hot bodies and is associated with thermal radiation. \medskip (c) Radio waves Frequency range: \( 3 \times 10^{6} \text{ Hz to } 3 \times 10^{8} \text{ Hz} \)
These are used in television and radio communication systems due to their long range and ability to carry signals.