Englishfor English speakers
glancing
adjective
—
making superficial contact
glancing
noun
—
A sideways look; a glance.
incidence
Noun
—
The incidence of something is how often it happens.
blood pressure checks would reduce the incidence of heart disease and sudden heart attacks.
There is a surprisingly high incidence of theft in book stores.
diffraction
—
noun
when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands