Answer:
The number of bright spot is m =4
Explanation:
From the question we are told that
The number of lines is 
The wavelength of the laser is 
Now the the slit is mathematically evaluated as

Generally the diffraction grating is mathematically represented as

Here m is the order of fringes (bright fringes) and at maximum m 
So

=> 
This implies that the number of bright spot is m =4
Once a hypothesis is tested and confirmed and then tested again and confirmed again by others, it may provide the basis for, or become a part of, a <em>theory </em>.
A metallic wire carrying current is not charged - it is electrically neutral.
This is because a wire, or any type of conductor, cannot store charge - the fact that it is carrying current means that charge carriers that already existed in the wire are in motion. There are as many electrons as there are protons in the wire, which makes it neutral - there is no buildup of charge.
Answer:
Your answer should be 90.51kg
Explanation: