Physics Test 20...

What is the angular spread of the first minimum and the central maximum when diffraction is observed with 540 nm light through a slit of width 1mm?​

Two identical point masses P and Q, suspended from two separate massless springs of spring constant k₁ and k₂, respectively, oscillate vertically. If their maximum speeds are the same, the ratio (A_Q/A_P) of the amplitude A_Q of mass Q to the amplitude A_P of mass P is:

Two waves are represented by the equations y₁ = a sin (ωt + kx + 0.57) m and y₂ = a cos (ωt + kx) m, where x is in meter and t in sec. The phase difference between them is

If the mass of the bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is x / 2 times its original time period. Then the value of x is:

A second pendulum is mounted in a space shuttle. Its period of oscillations will decrease when rocket is:

Fundamental note in open pipe (v₁ = ν/2L) has _________ the frequency of the fundamental note in closed organ pipe (v₂ = ν/4L).

A lens of power + 2.0 D is placed in contact with another lens of power – 1.0 D. The combination will behave like

If the Young’s apparatus is immersed in water, the effect on fringe width will

An unpolarised beam of intensity Io is incident on a polarizer and analyser placed in contact. The angle between the transmission axes of the polarizer and the analyser is θ. What is the intensity of light emerging out of the analyser?​

What is the relation between critical angle and refractive index?