A ventilation slit is to let fresh air into the castle and to shoot arrows from.
Moat high ground, slit windows
An arrowslit is a slit, such as can be seen in a castle wall, through which arrows can be fired.
It's called a loop-hole or sometimes an arrow loop
The past tense and past participle forms are both 'slit'.
Slitting is the present participle of slit.
The width of the slit in single-slit diffraction affects the appearance of the dark fringes by making them narrower and more defined as the slit width decreases.
Bum slit is an inborn thing.
The single slit diffraction formula is a special case of the double slit diffraction formula. The double slit formula accounts for interference between two slits, while the single slit formula considers diffraction from a single slit. The double slit formula can be derived from the single slit formula by considering the additional interference effects from the second slit.
In a double-slit experiment, the interference patterns produced by a single slit and a double slit differ in their complexity and visibility. The interference pattern from a single slit is a simple pattern of alternating light and dark bands, while the interference pattern from a double slit is a more intricate pattern of multiple bright and dark fringes.
The past participle is also slit.
Youngg.
The slit windows or archers' windows of medieval castles were also called loopholes.