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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...

Answered by Adam O. • Physics tutor

8603 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 ...

Answered by Michael H. • Physics tutor

36414 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 aft...

Answered by Elinor R. • French tutor

4063 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 a...

Answered by Michael H. • Maths tutor

17667 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...

Answered by Grace B. • German tutor

24755 Views