The diagram shows a simplified version of the electromagnetic spectrum - Leaving Cert Physics - Question 7 - 2012

A: Infrared radiation can be detected using a thermocouple or a thermal imaging camera, which senses heat emitted by objects.

B: Ultraviolet radiation can be detected using substances that fluoresce, such as certain phosphors or photographic film.

This radiation with a wavelength of 4 m is located in the microwave section of the electromagnetic spectrum, specifically categorized as a short wave radio / TV, EM radio.

Interference occurs when two or more waves overlap, resulting in regions of constructive and destructive interference, which manifest as patterns of greater and lesser intensity. In contrast, diffraction refers to the bending of waves around obstacles and through apertures, which causes spreading of the wave fronts.

Yes, a diffraction grating that diffracts light can also diffract X-rays, but the grating must have spacing similar to the wavelength of the radiation being diffracted. Since X-rays have much shorter wavelengths, a specific type of grating designed for X-ray diffraction is necessary.

Another type of wave motion is longitudinal waves.

1. In transverse waves, the particle motion is perpendicular to the direction of wave travel, whereas, in longitudinal waves, the particle motion is parallel to the direction of wave travel.

2. Transverse waves can propagate in solids and surface of liquids, while longitudinal waves can propagate in solids, liquids, and gases.