The Critical Angle Derivation. So the critical angle is defined as the angle of incidence that provides an angle of refraction of 90-degrees. Make particular note that the critical angle is an angle of incidence value. For the water-air boundary, the critical angle is 48.6-degrees.
The average IQ is 100. Have you wondered what your IQ score is? Our original IQ Test will give you a fast, free and accurate iq score. Take our quick free IQ test and find out just how smart you are. What others had to say... A person's Intelligence Quotient (IQ) is, arguably, one of their most important characteristics.
IQ testing can help determine your level of intelligence relative to others in your age group. âIQâ is an acronym for âintelligence quotient.â. There are several standardized IQ tests available.Two of the most widely recognized are the Stanford-Binet Intelligence Scales and the Wechsler tests.nterpreting IQ Test Results. Average scores for the Wechsler and Stanford-Binet tests are between 90 and 110. A score below 70 indicates mental retardation. Those who score over 165 are considered geniuses.