Light of wavelength 640.0 nanometers (nm) passes through a pair of double slits with a
certain separation and falls on a screen. If the
angle between the center and 2nd
interference maximum is 1.850°, what is the
separation between the slits (um)?

Positrons are spontaneously emitted from the nuclei of

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.