Ahe–ne laser illuminates a narrow, single slit that is 1850 nm wide. the first dark fringe is found at an angle of 20.0∘ from the central peak. 1) determine the wavelength of the light from the laser. (express your answer to three significant figures.)

Wavelength of light will be 632.73 nm

Explanation:

We have given width of the single slit

Angle is given as

We have to find the wavelength of light for first dark fringe

We know that for dark fringe it is given that

For first fringe n = 1

So

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia