Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object through ...

Most people will use Microsoft Word for school and work purposes, so this article will show you how to make a Venn diagram in Word using Regular shapes or Smart art shapes & insert text in the middle ...

When light moves from air into glass or plastic it is refracted close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ...