Wave Optics Tes...

Which of the following quantities is not carried by light ?

The equation of a transverse wave is $$z=a\ \sin \left\{\omega t-\dfrac {k}{2}(x+y)\right\}$$ 
The equation of wavefront is :

An isotropic point source emits light. A screen is situated at  a given distance. If the distance between sources and screen is decreased by $$2\%$$, illuminance will increase by:

Two sources $$S_{1}$$ and $$S_{2}$$ separated by $$2$$ metres vibrate according to the equations $$y_{1} = 0.03\sin \pi t$$ and $$y_{2} = 0.02 \sin \pi t$$ where $$y_{1}$$ and $$y_{2}$$ are in metres. They send out waves of velocity $$1.5 m/s$$. The amplitude of the resultant motion of particle collinear with $$S_{1}$$ and $$S_{2}$$ and at the middle of $$S_{1} S_{2}$$ will be :

If $$n$$ coherent sources of intensity $$I_0$$ are super imposed at a point, the intensity of the point is :

The wavefronts of a light coming from a distant source of unknown shape are nearly

In YDSE, find the thickness of a glass slab $$(\mu=1.5)$$ which should be placed before the upper slit $$S_{1}$$ so that the central maximum now lies at  a point where $$5th$$ bright fringe was lying earlier (before inserting the slab). Wavelength of light used is $$5000\mathring{A}$$.

Light is incident at an angle $$\phi$$ with the normal to a plane containing two slits of separation d. Select the expression that correctly describes the positions of the interference maxima in terms of the incoming angle $$\phi$$ and outgoing angle $$\theta$$.

A plane wavefront travelling in a straight line in a vacuum encounters a medium of refractive index $$m$$. At $$P$$, the shape of the wavefront is

Given figure shows two coherent sources $$S_{1}$$ and $$S_{2}$$ vibrating in same phase. AB is an irregular wire lying at a far distance from the sources $$S_{1}$$ and $$S_{2}$$. Let $$\dfrac{\lambda}{d}=10^{-3} \angle BOA ={0.12^\circ}$$. How many bright spots will be seen on the wire, including points $$A$$ and $$B$$?