In a Young's experiment, 3 mm is the width of the fringes obtained with light having a wavelength of 9000 A. If the entire apparatus is immersed in a liquid of refractive index 1.33, then what is the fringe width?

The radius of the nucleus is smaller than the radius of an atom by which of the following factors?

Calculate the mass defect of Oxygen (atomic mass = 16, atomic number = 8) in MeV/cz.

In relation to spectral series, which of the following options correctly states the Brackett series? (Consider that A is the wavelength, R is Rydberg constant, and n may have integral values.)

If the least distance of distinct vision for a person is 50 cm, then what should be the focal length of the reading spectacles for that person?

Which of the following types of forces is experienced by a dipole that is placed in a uniform electric f‌ield with its axis parallel to the f‌ield?

A compass in a magnetic field will line up __________.

_____ is the property of increasing pitch that accompanies increases in the tones frequency.

As __________________ decreases, then light energy increases.

An atom with z = 26 and a = 58 contains ________ protons and ________ neutrons.

Capillary beds have precapillary ____________ at the junction of capillaries and the metarteriole.