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.
Recommended shower dimensions and clearance - A shower size of 36 x 36 inches (91 x 91cm) is recommended. 30 inches (76cm) of clear space is recommended in front of the entry to the shower. Minimum shower dimensions and clearance. - a minimum shower size of 30 x 30 inches (66 x 66cm) is required.