Final answer:
From the ground, we can observe radio waves and visible light, as they are not easily absorbed by the Earth's atmosphere, unlike gamma radiation, ultraviolet, and X-ray light, which are generally blocked.
Step-by-step explanation:
The student is inquiring about which types of electromagnetic radiation can be observed from the ground. The answer includes the following observations:
- Radio waves: These can be observed from the ground because they have long wavelengths that can travel long distances and are not easily absorbed by the Earth's atmosphere.
- Visible light: This is the only part of the electromagnetic spectrum that is visible to the human eye, and it can be observed from the ground without any special equipment.
However, gamma radiation, ultraviolet light, and X-ray light generally cannot be observed from the ground because the Earth's atmosphere absorbs these higher-energy forms of radiation before they can reach the surface.
Therefore, the correct options for the student's question are radio waves and visible light, which are a. and e. respectively.