Ultraviolet rays present in tanning lamps are _____________.

The correct answer, which indicates that tanning lamps emit both UVA and UVB rays, is based on the understanding of how these types of ultraviolet radiation affect the skin and contribute to tanning.

UVA rays primarily penetrate the skin more deeply and are responsible for the immediate tanning effect. They can also lead to skin aging and contribute to the risk of skin cancer over time. UVB rays, on the other hand, affect the outer layer of the skin and are responsible for producing a delayed tanning response; they also significantly contribute to sunburn and have a critical role in the body's vitamin D synthesis.

Tanning lamps are designed to emit both types of UV rays to create a more efficient and rapid tanning effect. This combination is what makes tanning lamps effective for achieving the desired skin pigmentation through controlled exposure to UV radiation. It is important for individuals using tanning beds to understand the full spectrum of UV rays they are being exposed to, as different rays have varying effects on skin health and tanning results.

The other types, such as UVC, are generally not relevant in this context since UVC rays do not typically reach the earth’s surface due to their absorption by the ozone layer and are usually filtered out in indoor tanning equipment. Hence, the emission of UVA