Answer:
123.18 nm
Explanation:
Given:
- Refractive index of the glass=1.5
- Index of magnesium fluoride=1.38
- Wavelength of the light =680 nm
Let t be the thickness of the film. The relation between the wavelength of light in film and thickness of the film in order to have no reflection is given by
Now According to question we have
where n is the refractive index of the film.
Now thickness t is given by
Hence the thickness of the film is calculated in order to have no reflection.
I believe it’s B,C,and also E
Whenever there is a change in velocity, either due to a change in speed or a change in direction, there will be non-zero acceleration. ... Acceleration is not constant if the net force is not constant.
hope that helps! mind to mark me brainleist
Given: Work W = 44 J; Mass of the rope and the bucket m= 1.5 Kg
Required: Find the height in meters
Formula: Work = Force x distance but Force = Weight = mg g = 9.8 m/s²
W =Fd W = mgh h = W/mg
h = 44 J/(1.5 Kg)(9.8 m/s²)
h = 2.99 m or 3 m
Answer:
(c) keeping the orientation of the loop fixed and moving it along the field lines
Explanation:
Ampere's Law current is calculated by evaluating;
∫ B. dl
Here B= magnetic field and dl- length segment in which current is to flow.
Clearly as magnate field lines are perpendicular to the plane of loop having some length ==> dot product will be zero for 90 ° angle and hence current will be zero in the loop i-e we will keep the position of loop and move it along field lines !