If the laser emits in the visible region then the radiation is perceived as a single colour. The wavelength of light is usually measured in nanometres, or one-thousand-millionth of a metre and is abbreviated to â. â.
A shower or tub equipped with a showerhead shall have a minimum ceiling height of 6 feet 8 inches (2036 mm) above a minimum area 30 inches (762 mm) by 30 inches (762 mm) at the showerhead. The tub/shower is set in an alcove that has as a partial sloped ceiling.
Codes will allow a minimum 30â³ x 30â³ stall. A shower with an angled door should be at least 32â³ x 32â³. 10. Tub and shower controls The height of shower controls should be 38â³ to 48â³ from the floor, depending upon the height of the user. Tub controls should be between the rim of the tub and no higher than 33â³ from the floor.