explain O-a points sorp SE938 P 017 My Notes o Ask your Teach The objective lens

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explain

O-a points sorp SE938 P 017 My Notes o Ask your Teach The objective lens of a certain refracting telescope has a diameter of 63.0 cm. The telescope mounted in a satellite that orbits the Earth at an altitude ar 360 km to view objects on the Earth's surface. Assuming an average wavelength ar soo mm, find the minimum distance between two objects on the ground if their images are to be resolved by this iens. Need Help? Reson points SerPSE9 38 P 038 M My Notea o Ask Your Teach If the spacing between planes of atoms a NaCl crystal is 0.281 nm, what is the predicted angle at which 0.188-nm x-rays are diffracted in a first-order maximum? Need Help? Read Mastern

Explanation / Answer

1)

delta theta = 1.22 lambda/D = 1.22 *500 nm /0.63 m = d/x

d = x*1.22 *500 x10^-9 /0.63 =   3.60*10^5 *9.68 x10^-7

= 0.348 m

2)

2d sin Q = lambda = 0.188, sinQ = 0.188/(2*0.281)

= 0.3345 Q = 19.54 degrees

3)

2dsin8.8 = lambda

lambda = 2*0.353*0.153

=0.108 nm

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