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.
You will also need to to have a finished ceiling height of 80 inches minimum and a shower that's at least 30 by 30 inches to comply with the National Kitchen & Bath Association's guidelines for bathrooms. If you decide to plan for a bench, make sure it doesn't crowd this space of 30 by 30 inches minimum.n the renovated bathroom here, a small 1926 tub was replaced with a curbless shower. The walkway from the vanity to the shower was too tight for a swinging shower door, which is why this shower has two glass block walls instead.