Gamma Rays have a shorter wavelength than visible light and heat. Therefore they are:

Gamma rays possess a shorter wavelength compared to both visible light and heat, which places them in a much higher energy category on the electromagnetic spectrum. This high energy level is a significant factor in their ability to penetrate materials.

The penetrating power of gamma rays is due to their high frequency and energy, which allows them to pass through many substances that would absorb or reflect lower-energy forms of radiation such as visible light or infrared radiation (heat). This is one of the reasons why gamma rays can be used in various applications, such as medical imaging and industrial radiography, where penetrating through dense materials is essential.

Understanding the nature of gamma rays in relation to their wavelength and energy is crucial in fields that utilize radiation, as it highlights their effectiveness in penetrating barriers that would typically block other forms of radiation. This property is what distinguishes gamma rays within the broader spectrum of electromagnetic radiation and underlines their practical applications in both scientific and industrial settings.