Maths-

General

Easy

Question

# I:

II: Which of the following is true

- Only I is true
- Only II is true
- Both I and II true
- Neither I nor II true

## The correct answer is: Both I and II true

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### The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incor-rect?

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### In the set up shown in Fig the two slits, and are not equidistant from the slit S. The central fringe at O is then

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### In a Young’s double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive index is placed in front of the slit then the path difference

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### Following figure shows sources and that emits light of wavelength in all directions. The sources are exactly in phase and are separated by a distance equal to If we start at the indicated start point and travel along path 1 and 2, the interference produce a maxima all along

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### Two coherent sources separated by distance d are radiating in phase having wavelength . A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of n = 4 interference maxima is given as

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### A beam with wavelength falls on a stack of partially reflecting planes with separation d. The angle that the beam should make with the planes so that the beams reflected from successive planes may interfere constructively is (where n =1, 2, ……)

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### Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2l radian. If there is a maximum in direction D the distance XO using n as an integer is given by

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### Two ideal slits S_{1} and S_{2} are at a distance d apart, and illuminated by light of wavelength passing through an ideal source slit S placed on the line through S_{2} as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which there is darkness at O is

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### A monochromatic beam of light falls on YDSE apparatus at some angle (say ) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S_{2}. The central bright fringe (path difference = 0) will be obtained

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### Given The number of electrons present in l = 2 is

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