When θ = 0 in relation d sinθ = λ, the path difference between the rays coming out from the slits of the grating will be zero. So the image in this directions is
A whistle is revolved with high speed in a horizontal circle of radius R. to an observer at the centre of the circle the frequency of the whistle will appear to be:
Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be
If source and observer are moving towards each other with same speed and aftercrossing they are
receding each other then frequency observed by observer:
In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will
If a light of λ = 588 nm falls on half silvered glass plate in Michelson s interferometer if movable mirror is moved through 0.233 mm the number of fringes will be observed to shift
A body of mass 5 kg is moving with a momentum of 10 kg m/s.A force of 0.2 N acts on it in the direction of motion of the body for 10 seconds.The increase in its kinetic energy is
The initial velocity of a body moving along a straight line in 7 m/s.It has a uniform acceleration of 4 m/s2.The distance covered by the body in the 5th second of its motion is
Oxygen and sulphur are present in VI-A group of the periodic table The hydride of oxygen i.e., H2O is liquid at room temperature but the hydride of sulphur (H2S) is a gas. This is due to
A compound X has all of the properties below. It is a liquid at 25°C it mixes completely with water it reaets with aqueous sodium hydroxide, What could X be?
The molecular mass of a polymer is obtained by multiplying mass of the monomer unit with the degree of polymerization, The degree of polymerization of PVC is 1000.What is molecular mass?
Dichlorodifluoromethane, CC/2F2 has been used in aeroso propellants and as a refrigerant. Which statement helps to explain why dichlorodifluromethane is chemically inert ?
Glendon providers a dark underside to Frederick Jackson Turner's frontier thesis that saw rugged individualism as the essence of American society ______ an individualism that she sees as ______ atomism
In place of the more general debate about abstract principles of government that most delegates probably expected the Constitutional Convention put ______ proposals on the table
It is characteristic of the Metropolitan Opera as of every major international company that the casting is based more on the availability of singers as it is on the tastes of the music director and the public
The commission studying mass transportation suggested that the Metropolitan Transit Authority hold off purchasing new subway cars and spend money instead on preventive maintenance of all cars on repairs of substandard cars on crime prevention in all stations an better lighting for the busiest stations
The president of the block association tried to convince her neighbours they should join forces to prevent crime in the neighbour hood rather than continuing to be victimized
The accident victim was very grateful to the hospital that had saved his life but viewed his insurance company with suspicion out of fear that it will refuse to pay his claim and very expensive medical bills
Even though he is a leading authority on the French Revolution, the chairperson of the department is a __________ speaker wohos lectures on even the most exciting aspect of that historical period cause students to yawn and fidget.
