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.
Shower Curtain Rod Height. A standard shower curtain is typically 72 inches long, so the curtain rod should be installed around 75 to 77 inches from the floor. This height will keep the shower curtain from touching the floor. It will also allow a shower liner to extend past the top of the tub so it stays in the tub during a shower and does not slip over and let water get on the bathroom floor.