(a) Isotherma
(b) Adiabatic
(c) Isochoric
(d) Isobaric
Answer:
Waves which do not require any material medium for its propagation is
(a) Electromagnetic waves
(b) Elastic waves
(c) Matter waves
(d) Mechanical waves
Answer:
Instrument used to study the behaviour of a vibrating string is
(a) Barometer
(b) Hydrometer
(c) hydrometer
(d) Sonometer
Answer:
Which one of the following explains that all the galaxies are receding from us
(a) Red shift
(b) Black holes
(c) White dwarfs
(d) Neutrons stars
Answer:
There is no net transfer of energy by the particles of the medium in
(a) Progressive waves
(b) Stationary waves
(c) Longitudinal waves
(d) Transverse waves
Answer:
Who firstly demonstrated experimentally the existence of electromagnetic wave?
(a) Maxwell
(b) Newton
(c) Hertz
(d) Marconi
Answer:
Critical angle of light passing from glass to water is minimum for
(a) Yellow colour
(b) Violet colour
(c) Red colour
(d) Green colour
Answer:
A virtual image larger than the object can be formed by a
(a) Convex lens
(b) Concave lens
(c) Concave mirror
(d) Convex mirror
Answer:
Which mirror is to be used to obtain a parallel beam of light from a small lamp?
(a) Concave mirror
(b) Plane mirror
(c) Convex mirror
(d) None of these
Answer:
Spectrum of the sun consists of
(a) Dark bands
(b) Bright bands
(c) Bright lines
(d) Dark lines
Answer: