When an atom is placed in an external magnetic field, the electron orbit precesses about the direction of external magnetic field. There will be change in angular velocity of electron without any change in form of orbit.
ii) The relationship between angles of incidence () and refraction is expressed by
When a particle is influenced simultaneously by two simple harmonic motions at right angles to each other, the resultant motion of particle traces a curve called Lissajous figure. Lissajous figures are helpful in determining ratio of time periods of two vibrations.
The unit cell geometry is completely defined in terms of six parameters; the three edge lengths and three inter axial angles which we referred to as lattice parameters.
It is acronym for Light Amplification by Stimulated Emission of Radiation. Laser is that device in which an intense, monochromatic, coherent and unidirectional light beam is obtained.
Energy can neither be created nor destroyed, but it can be transformed from one form to other.
It states that static friction is independent of area of contact, depends on nature of surfaces in contact & maximum value is directly proportional to normal force.
Kinetic friction is independent of area of contact; kinetic friction is independent of relative speed between two contact surfaces and is directly proportional to normal force.
When no external torque acts, then angular momentum of rotating system remains conserved.
When a force is applied on a body such that there is a change in the length of the body, the longitudinal force per unit area is called longitudinal stress.
It is the change in length per unit original length or it is fractional change in length.
It is the distance inside the surface of superconductor at which flux density falls to 1/e of its value at the surface.
The spectrum of wavelength falling in Ultravoilet region of electromagnetic spectrum due to transition of electrons from higher energy states (orbits) to first orbit (inner most orbit) is called Lyman series.
If the parent alpha emitter emits alpha particles when it is in an excited state then we get long range alpha particles.
The amount of heat needed to change the state of a given substance without any change in temperature. |