Sorry I'm so late, but I just took this test and the answer is white (for people who didn't study well ;) )
Answer:
The SI unit of length verified globally is meters(m)
Answer:
C
Explanation:
the formula is a + b = ab
Answer:
to check for errors.
Explanation:
since some of the components of the scale are metallic, they are prone to rusting which would cause error in reading of the scale so there is organized checking if the scale to correct that.
hope it helps .
Answer:
The smallest film thickness is 117 nm.
Explanation:
Light interference on thin films can be constructive or destructive. Constructive interference is dependent on the film thickness and the refractive index of the medium.
For the first interference (surface nearest to viewer), the minimum thickness can be expressed as:

where n is the refractive index of the bubble film.
Therefore,


∴ 
