The refractive index of a certain glass is 1.66. For what incident angle is light reflected from the surface of this glass completely polarized if the glass is immersed in (a) air and (b) wate

To Test the Value of Gravitational Acceleration at Earth’s Surface Mennum Subba Saint Cloud State University Abstract When the object is freely falling under the influence of gravity, it is freefall. This experiment is done to calculate the value of gravitational acceleration on a body at earth’s surface under the interval of time with the same frequency.Acceleration due to gravity is not affected by mass, shape, position, temperature and pressure but affected by air resistance and other external forces. We calculated the mean value of acceleration due gravity or freefall as 974.1783 cm/s and its standard deviation is 0.8436567 cm/s and an error analysis of 0.59405102%. Therefore, we calculated the acceleration due to gravity on an object which had a littl