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Defects of vision and their correction
There is a simple relationship between the focal length F ,the object distance P and the image distance Q of a thin lens fig(1).
If F measured in mete ,then 1/F is the lens strength in diopter(D).-The focal length of a combination of tow lenses with focal length F1,and F2 is given by 1/F=1/F1+1/F2
two students walk in the same direction along a straight path at a constant speed one at .90m/s and another at 1.90m/s. assuming that they start at the same point and same time, ho
What is a monochromatic light? Ans: Breaking the word down mono denotes one and chromatic means of colour so a fairly literal translation for the adjective monochromatic w
There are two major differences between "center of gravity" and "center of mass": 1) The term "center of gravity" aplies to the bodies with mass and weight, while the term "cent
Are optical ports compatible? In general no there are optical ports are not compatible. Illuminator manufacturers use an exacting type of optical port to effect the connection
Propagation of an Electromagnetic Wave Electromagnetic waves are waves that can travel by the vacuum of outer space. Mechanical waves, not like electromagnetic waves, need the
Q. Illustrate how do you find your body volume using a tape measure? Answer:- Correctly measure a container into which your body will fit comfortably. Previously you recog
A Foucault pendulum to show the rotation of the earth A G-clamp with a ball bearing soldered to the inside of the jaw makes a excellent support for a Foucault Pendulum. It is
Que: What is an electric current? Answer: From Ohm's Law V = IR amid R being a constant one finds that I = V/R. therefore current is equal to voltage divided by resis
obtain expression for potential at point due to uniformly chargeddisc
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 3excited state. The atom returns to the ground state by emitting two photons. What are
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