Question

1. be familiar with the different wavelengths and frequencies of the electromagnetic spectrum and the different types of radiation

• radio
• microwave
• infrared
• visible
• ultraviolet
• x - ray
• gamma ray

Explanation:

The problem is about the electromagnetic spectrum and types of radiation, which falls under Physics (a subfield of Natural Science). The key is to recognize the topic's relation to physical concepts of electromagnetic waves.

Answer:

The subfield is Physics (under Natural Science). The electromagnetic spectrum and radiation types are core topics in Physics, dealing with wave properties, energy, and interactions.