Radio waves have the longest wavelengths in the electromagnetic spectrum, ranging from a few millimeters to several kilometers.

The human body emits infrared radiation due to its temperature, which is typically around 37 degrees Celsius.

Radio waves are commonly used for communication purposes, including radio broadcasting, television broadcasting, and mobile phone communication.

Visible light is the primary source of energy for photosynthesis in plants, as it is absorbed by chlorophyll molecules in the plant's leaves.

X-rays are used in medical imaging techniques like X-rays and CT scans due to their ability to penetrate through tissues and produce images of internal structures.

Radioactive elements emit alpha particles, beta particles, and gamma rays as part of their decay process.

Astronomers use radio waves, microwaves, infrared radiation, and ultraviolet radiation to study the composition and structure of celestial objects.

The cosmic background radiation left over from the Big Bang is called the cosmic microwave background.

X-rays are used to study the Sun's activity and solar flares, as they can penetrate through the Sun's atmosphere and provide information about its structure and dynamics.

Stars and other hot objects emit ultraviolet radiation, visible light, and infrared radiation.

Radio waves are used to study the interstellar medium and molecular clouds, as they can penetrate through dust and gas and provide information about their composition and structure.

The Wilkinson Microwave Anisotropy Probe (WMAP) was a NASA satellite designed to study the cosmic microwave background.

Astronomers use visible light, infrared radiation, ultraviolet radiation, and X-rays to study the properties of galaxies and their evolution.

The James Webb Space Telescope (JWST) is a NASA telescope designed to study the early universe and the formation of galaxies.

X-rays are used to study the properties of black holes and other compact objects, as they can penetrate through the dense matter surrounding these objects and provide information about their structure and behavior.