Samata may refer to: 1  Samata (NGO), an India-based non-governmental organization. 2  Samata Party, a political party in India. 3  Samata Express, a Super Fast Express train between Visakhapatnam and Hazrat Nizamuddin, near New Delhi, in India.
After Maxwell published his theory of electromagnetism, it became possible to calculate the speed of light indirectly by instead measuring the magnetic permeability and electric permittivity of free space. This was first done by Weber and Kohlrausch in 1857. In 1907 Rosa and Dorsey obtained 299,788 km/s in this way.
Light is measured by its wavelength (in nanometers) or frequency (in Hertz). equals the distance between two successive wave crests or troughs. equals the number of waves that passes a given point per second.