How can ultra violet light be blocked?

Answer 1

Sunblock is one way to block UV waves. It can also be blocked through filters such as the lenses that are used in sunglasses. To block the UV waves, you need to use something that absorbs the waves.

Answer 2

Ultraviolet light can be blocked by using materials that absorb, reflect, or scatter the light. Some common materials used for blocking UV light include window tinting films, textiles with special coatings, and sunglasses with UV protection coatings. Use of these materials helps reduce exposure to harmful UV rays from the sun.