Fraunhofer lines are an example of ______spectrum.

The electric and magnetic fields of an electromagnetic wave are in phase and______to each other.

Which one of them is used to produce a propagating electromagnetic wave?

Which of the following is NOT true for electromagnetic waves?

Which of the following electromagnetic radiations is used for viewing objects

through fog?

Which of the following is false for electromagnetic waves?

________ can be defined as ‘the current which comes into play in the region in which the electric field and the electric flux are changing with time

The law which states that the surface integral of magnetic field over a closed surface is zero

________ radiation is used in TV remote.

When the spectrum obtained from the Sun is examined, it consists of large number of dark lines (line absorption spectrum).

These dark lines in the solar spectrum are known as

__________ are nonmechanical waves which move with speed equals to the speed of light (in vacuum)

when white light is passed through diluted solution of blood or chlorophyll_______ spectrum is obtained.

If the light from the carbon arc is made to pass through Sodium vapour_____ spectrum is obtained.

When light is allowed to pass through

a medium or an absorbing substance then the spectrum obtained is known as

Spectra of ammonia gas in the discharge tube is an example of________ spectrum.

Spectra of atomic hydrogen is an example of______ spectrum.

Incandescent solids emit______ spectrum.

______ is used in radio therapy for the treatment of cancer and tumor.

________ is used to destroy bacteria in sterilizing the surgical instruments, burglar alarm, to detect the invisible writing, finger prints and also in the study of atomic structure.

_____ is used in detecting fractures, diseased organs.

__________ is used in very long distance wireless communication through satellites.

__________ is used in television communication systems and also in cellular phones to transmit voice communication in the ultra high frequency band.

The law which relates the magnetic field around any closed path to the conduction current and displacement current through that path is

The law which relates electric field with the changing magnetic flux is

The incident ray, reflected ray and the normal to the surface are_______

The angle between the incident and deviated ray is called angle of

For light incident from air on a slab of refractive index 2, the maximum possible angle of refraction is_____ degrees.

A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the

image is

In a Young’s double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen,

the screen-to-slit distance D must be changed to,

The distance measured to the left of pole along the principal axis are taken as________.

The angle of incidence in the denser medium for which the refracted ray graces the boundary is called

In total internal reflection phenomenon light must travel from

For total internal reflection to occur the angle of incidence must be_______ critical angle.

The glittering of diamond is due to

According to___________ scattering Law shorter wavelengths are scattered much more than longer wavelengths.

______proposed corpuscular theory of light.

_________proposed the wave theory of light.

A point source located at a finite distance gives______ wavefront.

A point source located at infinite distance gives______ wavefront

The phenomenon of superposition of two light waves which produces increase in intensity at some points and decrease in intensity at some other points is called________ of light.

The________ is defined as the distance between any two consecutive bright or dark fringes.

The middle point on the spherical surface of the mirror is called

The radius of the sphere of which the spherical mirror is a part is called

The distance between the pole (P) and the Focus (F) is called

The centre of the sphere of which the mirror is a part is called

Heights measured in the downward perpendicular direction to the principal axis are taken as

Principle of reversiability is true for

Stars twinkle due to

A plane glass is placed over a various coloured letters (violet, green, yellow,

red) The letter which appears to be raised more is,