Define the solid angle.
What will be an ideal response?
The solid angle is a three dimensional construction of a cone beginning at a
point and encloses a normal, orthogonal, or perpendicular area. The solid angle
is the area divided by the distance that area is from the starting point;
sometimes called the inverse square law because it is quantified by the normal
area divided by the distance squared. Any area other than a differential area will
be a uniform convex surface from the point source. The unit of the solid angle is
the steradian.
You might also like to view...
According to Kepler's second law, Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse. What is at the other focus of the ellipse?
a. nothing b. the Earth c. The comet itself passes through the other focus. d. The tail of the comet stays at the other ellipse.
An astronaut outside a spaceship hammers a loose rivet back in place. What happens to the astronaut as he swings the hammer?
a. Nothing. The spaceship takes up the momentum of the hammer. b. He moves away from the spaceship. c. He moves towards the spaceship. d. He moves towards the spaceship as he pulls the hammer back and moves away from it as he swings the hammer forward. e. He moves away from the spaceship as he pulls the hammer back and moves toward it as he swings the hammer forward.
How do the escape speeds for two rockets, the first weighing 20 N and the second weighing 20,000 N compare?
A) The escape speed for the lighter rocket is smaller than that for the heavier rocket. B) The escape speed for the lighter rocket is the same as that for the heavier rocket. C) The escape speed for the lighter rocket is greater than that for the heavier rocket.
Whenever water condenses,
A) heat is absorbed. B) heat is released. C) frost forms. D) temperature drops.