Wave Optics Tes...

Wavelength of light used in an optical instrument are $$\lambda_1=4000\overset{o}{A}$$ and $$\lambda_2=5000\overset{o}{A}$$, then ratio of their respective resolving powers(corresponding to $$\lambda_1$$ and $$\lambda_2$$) is?

The sensor is exposed for $$0.1 s$$ to a $$200 W$$ lamp $$10 m$$ away. The sensor has opening that is $$20 mm$$ in a diameter. How many photons enter the sensor if the wavelength of light is $$600 mm$$? (assume that all the energy of the lamp is given off as light).

An analyser is inclined to a polarizer at an angle of $$30^o$$. the intensity of light emerging from the analyser is $$\dfrac{1}{n}^{th}$$ of that is incident on the polarizer. Then n is equal to 

Ratio of intensity of two waves is $$25 : 1$$. If interference occurs, then ratio of maximum and minimum intensity should be:-

The wavefront of a lightbeam is given by the equation $$x+2y+3z=c$$,(where c is arbitary constant) the angle made by the direction of light with the y-axis is:

In Young's double slit experiment, the two slits are $$0.2 mm$$ apart. The interference fringes for light of wavelength $$6000 \mathring{A}$$ are found on the screen $$80 cm$$ away. The distance  of fifth dark fringe, from the central fringe, will be:

Two particles of masses $$m$$ and $$2m$$ are kept at a separation $$'d'$$. Then the distance of the point on the line joining the particle where the intensity is zero is:-

Two coherent sources of wavelength $$6.2\times 10^{-7}$$m produce interference. The path difference corresponding to $$10^{th}$$ order maximum will be?

Unpolarised light of intensity $$I_{o}$$ passes through two polaroids; the axes of one is vertical. The intensity of transmitted light is:

In $$YDSE$$ interference pattern produced by two identical slits, the intensity at the site of the central maximum is $$I$$. the intensity at the same spot when either of two slits is closed is