Question 1 (d) Sketch and highlight the main features of the Airy function that describes the int...
Question 1 (d) Sketch and highlight the main features of the Airy function that describes the intensity of a parallel beam of light diffracted by a circular aperture as a function of the angle relative to the direction of the incident light. Show how the form of this function leads to the Rayleigh Criterion that defines the angular resolution of a telescope. I have recently bought an astronomical telescope with a mirror diameter of 20 cm. What is the angular resolution of the telescope? If the distance from Earth to Mars is 50 million kilometres, how far apart do two Martian surface features have to be for them to be resolved? 131 12] e) A train whistles at a frequency of 4000 Hz whilst travelling at 36 km/hour. If you are standing next to the track, what frequency is heard whilst the train is approaching you and when it is receding? (Take the speed of sound to be 340 ms. Explain why the spectrum of light received from other galaxies is shifted to the red end of the electromagnetic spectrum. 12] 12]
Question 1 (d) Sketch and highlight the main features of the Airy function that describes the intensity of a parallel beam of light diffracted by a circular aperture as a function of the angle relative to the direction of the incident light. Show how the form of this function leads to the Rayleigh Criterion that defines the angular resolution of a telescope. I have recently bought an astronomical telescope with a mirror diameter of 20 cm. What is the angular resolution of the telescope? If the distance from Earth to Mars is 50 million kilometres, how far apart do two Martian surface features have to be for them to be resolved? 131 12] e) A train whistles at a frequency of 4000 Hz whilst travelling at 36 km/hour. If you are standing next to the track, what frequency is heard whilst the train is approaching you and when it is receding? (Take the speed of sound to be 340 ms. Explain why the spectrum of light received from other galaxies is shifted to the red end of the electromagnetic spectrum. 12] 12]