The book should prove most useful to all those-and they are very many indeed just now-whose duties bring them very frequently into contact with cathode ray tubes.

India has discovered rare earth elements like Scandium and Strontium in coal mine waste at Telangana’s open-cast mines. The government is now expanding exploration to other mining and petroleum ...

Inorganic LEDs are light-emitting diodes (LEDs) made from a crystalline semiconductor. The optical emission wavelength can be selected by varying material composition.

Both UVA and UVB rays can damage your skin, just in different ways. One causes premature aging, the other is more prone to causing sunburn, DNA damage, and skin cancer.

Sunscreen protects you from premature aging and skin cancer by absorbing the sun's UV rays. Learn about sun protection, including tips.