Answer:
The diameter of the aperture is 0.321 m
Explanation:
The expression for the angle with wavelength is equal to:
(eq. 1)
Where
λ = wavelength
d = diameter of the lens
The expression for the angle of the satellite is:
(eq. 2)
Where
h = distance between the Earth and the Moon
Like small angles:
Matching both equations and clearing Δx:
(eq. 3)
Where
λ = 633 nm = 633x10⁻⁹m
For the width of the central maxima is equal:
Where
w = 1.85 km
Replacing:
From equation 3, the diameter of the aperture is:
h = 3.84x10⁵km = distance between the Earth and the Moon
Replacing:
Answer:
Explanation:
we know that the time rate of change of velocity is called acceleration mathmetically;
a=Δv/Δt
Δv=a*Δt
a=10 m/s²
t=10 sec
Δv=10*10=100 m/s
Answer: State and explain, in terms of the forces acting,how the acceleration of the object varies during its fall. As the object is released two forces act on it. Its weight and and air resistance. At this point its weight is much greater due to the force of gravity on the object so it accelerates downward.
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Answer: 187.68 m
Explanation:
Given
Time period
The time period of a pendulum is given by
where L=height of tower
Put values