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What does the double slit experiment tell us about light?

Imagine an opaque barrier (no light can get through) with two parallel slits in it, onto which we shine a coherent light source (light of only one wavelength and in phase - a laser, for example, can produce ...
AO
Answered by Adam O. • Physics tutor
9181 Views

Show that the orbital period of a satellite is given by T^2=(4pi^2r^3)/(GM) where r is the orbital radius, G is the gravitational constant and M is the mass of the Earth. Then find the orbital radius of a geostationary satellite.

The first part of this question relies on remembering one key principle which is that for a satellite, or any body orbiting in a circle, centripetal force is provided by gravitational force. The rest is simp...
MH
Answered by Michael H. • Physics tutor
40353 Views

How do I form the negative in French?

To form a negative phrase in French there are always two parts, called particles, which most go around the verb. For example, 'ne...pas': the 'ne' must come before the verb and the 'pas' must come after the ...
ER
Answered by Elinor R. • French tutor
4482 Views

How do I integrate terms with sin^2(x) and cos^2(x) in them? For example integrate (1+sin(x))^2 with respect to x

As you will be aware, it is not easy to directly integrate terms involving sin^2(x) and cos^2(x), so we use a substitution to turn them into something which we can integrate. From the double angle formula fo...
MH
Answered by Michael H. • Maths tutor
19119 Views

How do I form the conditional tense in German, and how do I construct an ‘if’ clause?

Conditional sentences indicate degrees of possibility, or the extent to which an event or action is likely to happen. In English, this tense is used for talking about what you would do, if it were possible, ...
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Answered by Grace B. • German tutor
25618 Views