what is the angular separation between a star at Right Ascension
6hr and Declination 60 degrees...
what is the angular separation between a star at Right Ascension
6hr and Declination 60 degrees and another star at Right Ascension
0hr and Declination 60 degrees? and also please explain what is
angular separation?
1.
what is the angular separation (between a grating and screen) of
the second order maximums produced by 420nm and 300 nm wavelengths
incident upon a 450 lines/mm diffraction grating
2.
Boron nitride (a lubricant) with an index of refraction of 2.0
is heated within a microwave oven. If the speed of the microwaves
is 3.0X108m/s, what is the speed of the microwaves in
the boron nitride
i) Find the angular separation between the red hydrogen-α
spectral line at 656 nm and the yellow sodium line at 589 nm if the
two lines are observed in third order with a diffraction grating
having 3 500 slits per cm. (Give the answer in degrees, correct to
three significant figures.) [6]
(ii) Using the same diffraction grating as in (i) , what is the
highest order that could possibly be observed using violet light of
wavelength 420 nm?
Is the angular momentum of a planet conserved as it orbits a
star? Explain your answer using torque. Conservation of angular
momentum:
The angular momentum of an object or system is conserved
whenever the total external torque on the object or system is zero.
τ ⃗_ext=0 → ∆L ⃗=0
In a simple undirected graph H the sum of vertex degrees is 60.
What is the smallest possible number of vertices in this graph?
What is the largest possible number of vertices in the graph?
700nm light strikes a 12,000 lines / cm diffraction grating a)
determine the angular separation of the second maximum from the
center. Explain what happens to the second one in this case.
A copper disk at 850 degrees celsius rotating about its axis
with an angular speed of 25 rad/s in the outer space. As the disk
radiates infrared light, its temperature falls to 20 degrees
celsius. No external torque acts on the disk. Does the angular
speed of the disk change as it cools?
What is the difference between method of images (mi) ,
separation of variables (sv) and multipole expansion(me) ? What are
the signs that a problem is under mi, sp and me? What solution will
i use for each? Thank you!