ICSE Physics Class 9 Solutions Goyal Brothers. We covered all the ICSE Physics Class 9 Solutions Goyal Brothers in this post for free so that you can practice well for the exam.
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ICSE Physics Class 9 Trivia for Students
The refractive index of a material depends upon
(A) the permittivity of the medium
(B) the permeability of the medium
(C) both (A) and (B)
(D) the density of the medium
Option c – both (A) and (B)
The Wavelength range of visible light is
(A) 400-700 nm
(B) 100-300 nm
(C) 800-1000 nm
(D) 1200-1400 nm
Option a – 400-700 nm
A plane wavefront is incident on a plane surface at zero angles of incidence. The wavefront is :
(A) parallel to the surface
(B) perpendicular to the surface
(C) inclined at 45° with the surface
(D) inclined at 60° with the surface
Option a – parallel to the surface
In Huygens wave theory, the locus of all points in the same state of vibration is called :
(A) ray
(B) wavefront
(C) vibrator
(D) wavelength
Option b – wavefront
Which of the following does not support the wave nature of light? :
(A) Polarization
(B) Interference
(C) Diffraction
(D) Photoelectric effect
Option d – Photoelectric effect
Finally accepted nature of light is
(A) wave
(B) particle
(C) wave as well as a particle
(D) neither wave
Option c – wave as well as a particle
Particles of light are called as
(A) photon
(B) proton
(C) neutron
(D) electron
Option a – photon
Light waves are
(A) mechanical waves
(B) electromagnetic waves
(C) both (A) and (B)
(D) neither (A) nor (B)
Option b – electromagnetic waves
Electric and magnetic fields in light waves are
(A) parallel to each other
(B) perpendicular to each other
(C) 45° with each other
(D) 60° with each other
Option b – perpendicular to each other
The velocity of light waves in the medium depends upon
(A) the density of the medium
(B) the refractive index of the medium
(C) the elasticity of the medium
(D) inertia of medium
Option b – the refractive index of the medium
An isotropic medium is that in which :
(A) the speed of light changes
(B) the speed of light remains constant
(C) both (A) and (B)
(D) the direction of propagation of light changes
Option b – the speed of light remains constant
As per modern theory, light has :
(A) particle nature
(B) wave nature
(C) neither wave nor particle in nature
(D) wave as well as particle nature
Option d – wave as well as particle nature
Laser light is considered to be coherent because it consists of
(A) many wavelengths
(B) uncoordinated wavelength
(C) coordinated waves of exactly the same wavelength
(D) divergent beam
Option c – coordinated waves of exactly the same wavelength
The scientists who later changed Huygens’ theory and postulated that light consisted of transverse waves are:
(A) Newton
(B) Fresnel
(C) Young
(D) Maxwell
Option b – Fresnel
In accordance with the wave theory of light, the colors of light are due to different :
(A) amplitudes
(B) wavelengths
(C) frequencies
(D) phases
Option b – wavelengths
Color of light is determined by :
(A) amplitude
(B) wavelength
(C) frequency
(D) phase
Option c – frequency
Luminiferous ether medium has the property of
(A) zero density
(B) transparency
(C) elasticity and inertia
(D) all of these
Option d – all of these
Light is propagated in the form of transverse electromagnetic waves as per the opinion of
(A) Huygens
(B) Max Planck
(C) Newton
(D) Maxwell
Option d – Maxwell
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