Answer:
laser wavelength = 549.5 nm
Explanation:
Given data
separation d = 0.170 mm = 0.170 × 
m
interference pattern distance D = 4.95 m
two adjacent bright interference width w = 1.60 cm = 1.60 × 
m
to find out
laser's wavelength
solution
we know that fringe width formula that is
width = wavelength × distance / separation
we put all these value here to find wavelength
wavelength = 1.60 × × 0.170 × / 4.95
wavelength = 549.5 nm
so laser wavelength = 549.5 nm
Answer:
The speed of these waves is 222.22 m/s
Explanation:
A.
Since, we know that the speed of a wave is given by the formula:
v = fλ
where,
v = speed of wave
f = frequency of wave
λ = wavelength
Here,
λ = distance between consecutive wave crests
λ = 800 km = 8 x 10⁵ m
f = 1/Time Period = (1/1 hr)(1 hr/3600 s)
f = 2.77 x 10⁻⁴ s⁻¹
Therefore,
v = (2.77 x 10⁻⁴ s⁻¹)(8 x 10⁵ m)
<u>v = 222.22 m/s</u>
Because of the sun shining on the compost pile.
Answer:
The magnitude of the electric field is 
Explanation:
Given:
Charge of electron 
C
Separation between two charges 
m
For finding the magnitude of the electric field,
Where 
Therefore, the magnitude of the electric field is
Answer:
If it points the other way, the fields subtract, for a lower energy, and so the magnet prefers to turn to point in this way. Magnets in uniform fields feel torques which make them turn around if they are not pointing in the right direction, but there is no net force making the magnet want to levitate.
Explanation:
