Wave optics practice · Mixed difficulty

If white light is used in a YDSE setup, among the following the nearest bright fringe (maxima) from the central fringe will be formed by which of the colours

Which of the following the phenomenon cannot be explained
by corpuscular theory of light

A long narrow horizontal slit is placed $1 \mathrm{~mm}$ above a horizontal plane mirror. The interference between the light coming directly from the slit and that after reflection is seen on a screen $1.0 \mathrm{~m}$ away from the slit. Find the fringe-width if the light used has a wavelength of $700 \mathrm{~nm}$.

Interference may be seen using two independent

Assertion: The resolving power of a telscope more if the diameter ofthe objective lens is more.

Reason: Objective lens of large diameter collects more light.

If yellow light emitted by sodium lamp in Young’s double slit experiment is replaced by a monochromatic blue light of the same intensity

Wave nature of light is verified by

An electric bulb, connected to a make and break power supply, switches off and on every second in its rest frame. What is the frequency of its switching off and on as seen from a spaceship travelling at a speed $0.8 c?$

If white light is used in Young’s double slit experiment

Statement A: Diffraction of sound waves are more easily observed as compared to light waves.

Statement B: Wavelength of sound waves is more as compared to light.

By corpuscular theory of light, the phenomenon which can be explained is

Two polaroids are kept crossed to each other. Now one of them us rotated through an angle of $45^\circ$. The percentage of incident light now transmitted through the system is

For constructive interference to take place between two monochromatic light waves of wavelength $\lambda$, the path difference should be

Assertion: The resolving power of both microscope and telescope depends on the wavelength of light used.

Reason: The resolving power of a lens is the ability to resolve the two images so they are distinctly identified.

In YDSE experiment, when two light rays make third minima, then they have ($\lambda$ wave length of each light ray)

In Huygen’s wave theory, the locus of all points in the same state of vibration is called

Huygens wave theory allows us to know

Assertion: Radio waves diffract pronouncdly around the sharp edges of the buildings than visible light waves.

Reason: Wave length of radio waves is comparable to the dimension of the edges of the builging.

Assertion: Radio waves can be polarised.

Reason: Sound waves in air are longitudinal in nature.

A star moves away from earth at speed 0.8 c while emitting light of frequency $6 \times {10^{14}}Hz$.What frequency will be observed on the earth (in units of ${10^{14}}\;Hz$)($c =$ speed of light)

Statement I : To observe diffraction of light, the size of obstacle/aperture should be of the order of $10^{-7} \mathrm{~m}$.
Statement II : $10^{-7} \mathrm{~m}$ is the order of wavelength of the visible light.

In the interference pattern, energy is

In the intensity of Interference waves in an interference pattern is same as ${I_O}$. The resultant intensity at the point of observation will be

Appearance of colours on thin soap film is due to

Which one of the following property of light does not support wave theory of light?

Light waves travel in vacuum along the $y - \mathrm{axis}$. Which of the following may represent the wavefront?

According to Huygen’s theory of light

In Young’s double slit experiment, a glass plate is placed before a slit which absorbs half the intensity of light. Under this case

Doppler’s effect in sound in addition to relative velocity between source and observer, also depends while source and observer or both are moving. Doppler effect in light depends only on the relative velocity of source and observer. The reason of this is

High speed moving particles are studied under