The number of waves in a distance l is equal to _______________.

The length of the rod placed inside a rocket is measured as 1 m by an observer inside the rocket which is at rest. When the rocket moves with a speed of 36 x 10⁶ km/hr the length of the rod as measured by the same observer is ______________.

The number of de Broglie waves of an electron in the nth orbit of an atom is ___________.

The length of a moving scale is 6 m, whose velocity is 2 x 10⁷ m/s. Find its rest length.

If the potential difference is increased by 9 times, the de-Broglie wavelength becomes ________ times the original.

Find the kinetic energy if hv = 2.1 eV and work function is given as 5 x 10^-19J.

Wavelength of X-rays is ______ the wavelength of visible light

Nuclear fission and fusion processes are examples of _______

The change in kinetic energy of the particle is proportional to ________

Lorentz-Pitzgerald contraction occurs in _______ direction of motion.

The number of reference frames in our universe is _______

Fixed frames of reference are used in _____

Newtonian mechanics regarded that space existed _________

The third electromagnet put in the path of an electron beam in an electron microscope is called _________

______ is the basis for the electron microscope.

P and E denote the linear momentum and energy of a photon. If the wavelength is decreased ____________.

Emission of electrons by the absorption of heat energy is called ______ emission.

Photons of wavelength λ are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc of radius R by a perpendicular magnetic field having magnitude B. The work function of the metal is _____.

A light source of wavelength 520 nm emits 1.04 x 10¹⁵ photons per second while the second source of 460 nm produces 1.38 x 10¹⁵ photons per second. Then the ratio of power of second source to that of first source is _____.

The wavelength λ_e of an electron and λ_p of a photon of same energy E are related by _____.