Wave Optics Tes...

Ratio of maximum to minimum intensities at $$P$$ is

The shape of the interference fringes, on the screen is 

In Young's double slit experiment, if the widths of the slit are in the ratio $$4:9$$ , ratio of intensity of maxima to intensity of minima will be

In Young's double slit experiment, if monochromatic light used is replaced by white light then :

When an object is viewed with a light of wavelength $$6000\mathring{A}$$ under a microscope, its resolving power is $$10^4$$. The resolving power of the microscope when the same object is viewed with a light of wavelength $$4000\mathring{A}$$, is:

A: The corpuscular theory fails in explaining the velocities of light in air and water.
B: According to corpuscular theory, the light should travel faster in a 'denser medium than in a rarer medium.

The phases of the light wave at c, d, e and f are $$\phi_c, \phi_d, \phi_e$$ and $$\phi_f$$ respectively. It is given that $$\phi_c \neq \phi_r$$

Light of wavelength $$6000 \mathring {A}$$ is reflected at nearly normal incidence from a soap film of refractive index 1.4. The least thickness of the film that will appear black is.

A plane wave of monochromatic light falls normally on a uniformly thin film of oil which covers a glass plate. The wavelength of source constructive interference is observed for $$\lambda_{1} = 5000\overset {\circ}{A}$$ and $$\lambda_{2} = 10000\overset {\circ}{A}$$ and for no other wavelength in between. If $$\mu$$ of oil is $$1.25$$ and that of glass is $$1.5$$, the thickness of film will be ________ $$\mu m$$.

Two cohorent monochromatic light beams of intensities 4I and 9I interfere in a Young's double slit experimental setup to produce a fringe pattern on the screen. The phase difference between the beams at two points P and Q on the screen are $$\pi/2$$ and $$\pi/3$$ respectively. Then the ratio of the two intensities $$I_P/I_Q$$ is