Consider a long straight hollow cylindrical metal tube with an inner diameter of r. the possible te modes and tm modes for electromagnetic waves to propagate in this wave guide system

Which sound characteristic is not affected by the relative motion of an object

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.