To investigate how the intensity of the reflected ray varies with the angle of incidence.?

Question

To investigate how the intensity of the reflected ray varies with the angle of incidence which the light ray makes with the plane surface of a glass sample.

Answer 1

In a dark enclosed box measure the intensity of light for different angles on reflected incidence and compare to the source. ou can employ a photodiode or a phocel.
A few things are important
1. if you are using an artificial light source remember that intensity varies with a square of the distance
2. Your photo sensor is covered uniformly with light
3. the light collected is perpendicular to the surface of the sensor.
These are some rough ideas and I hope they will be of use.