MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions

If two light waves reaching a point produce destructive interference, then the condition of phase difference is ______

In the biprism experiment, the fringe width is 0.4 mm. What is the distance between the 4^th dark band and the 6^th bright band on the same side? 

The graph shows the variation of fringe width (β) versus distance of the screen from the plane of the slits (D) in Young's double-slit experiment Keeping other parameters the same. The wavelength of light used can be calculated as d = distance between the slits ______ 

Waves from two coherent sources of light having an intensity ratio I₁ : I₂ equal to 'x' interfere. Then in the interference pattern obtained on the screen, the value of (I_max - I_min)/(I_max + I_min) is ______ 

In a biprism experiment, monochromatic light of wavelength (λ) is used. The distance between two coherent sources is kept constant. If the distance between slit and eyepiece (D) is varied as D₁, D₂, D₃, and D₄, the corresponding measured fringe widths are z₁, z₂, z₃, and z₄ then ______ 

In the biprism experiment, a source of monochromatic light is used for a certain distance between slit and eyepiece. When the distance between two virtual sources is changed from d_A to d_B, then the fringe width is changed from Z_A to Z_B. The ratio Z_A to Z_B is ______

Light waves from two coherent sources arrive at two points on a screen with a path difference of zero and λ/2. The ratio of the intensities at the points is ______ 

A particle moves along a circular path of radius 'r' with uniform speed 'V'. The angle described by the particle in one second is ______.

In the case of conical pendulum, if 'T' is the tension in the string and 'θ' is the semi-vertical angle of cone, then the component which provides necessary centripetal force is ______.

The velocity of sound at 0 °C is v0. What will be its velocity at 819 °C?

In Young's double-slit experiment, if the two sources of light are very wide, then ______.

In Young's double slit experiment, for wavelength λ₁ the n^th bright fringe is obtained at a point P on the screen. Keeping the same setting, source of light is replaced by wavelength λ₂ and now (n + 1)^th bright fringe is obtained at the same point P on the screen. The value of n is ______.

Young's double slit experiment is performed in water, instead of air, then fringe width ______.

Two waves with same amplitude and frequency superpose at a point. The ratio of resultant intensities when they arrive in phase to that when they arrive 90° out of phase is ______.

`[cos  pi/2=0]`

A double slit experiment is immersed in water of refractive index 1.33. The slit separation is 1 mm, distance between slit and screen is 1.33 m. The slits are illuminated by a light of wavelength 6300 Å. The fringe width is ______.

The radius of the orbit of a geostationary satellite is (mean radius of the earth R, angular velocity about an axis in ω and acceleration due to gravity on earth's surface is (g) ______.

In Young's double-slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be obtained on the screen due to light of wavelength 480 nm and 600 run respectively. The separation on the screen between the 5^th order bright fringes on the two interference patterns is ______

In Young's double-slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be obtained on the screen due to light of wavelength 480 nm and 600 run respectively. The separation on the screen between the 5^th order bright fringes on the two interference patterns is ______

In an interference experiment, the intensity at a point is `(1/4)^"th"` of the maximum intensity. The angular position of this point is at ____________. 
(cos 60° = 0.5, `lambda` = wavelength of light, d = slit width)

Two coherent sources of intensities I₁ and I₂ produce an interference pattern on the screen. The maximum intensity in the interference pattern is ______