Awave can be described as
a continuous transmission of energy from one location to the next
the disturbance of particles in an area
the transmission of energy through individual particles
the motion of particles in a medium

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c