Can moral principles really govern? Is a code of ethics truly enforceable by a state agency? Kentucky General Assembly mandates that the Kentucky Board of Physical Therapy promulgate,
The angle made by the ray of light in the air to that of the reference light (the normal), is the angle of incidence, and the angle made by the ray of light in the glass to the same normal, is the angle of refraction. It is the ratio of the sines of both these angles that is the refractive index of the block of glass.
Lesson Summary. An acute angle is any angle smaller than 90 degrees. A right angle is an angle that measures 90 degrees. It doesn't matter how much smaller the angle is than 90 degrees; as long as it's smaller, it's acute. To unlock this lesson you must be a Study.com Member.