Explanation :
Static friction is the frictional force between two objects that are at rest. While sliding friction is the frictional force between two objects in contact and are sliding w.r.t each other.
Static friction is usually greater than sliding friction because in static friction the contact forces is more and the interlocking between objects is tight as compared to sliding friction.
Answer:
The critical angle is ![\theta _c = 62.57^o](https://tex.z-dn.net/?f=%5Ctheta%20%20_c%20%20%3D%20%2062.57%5Eo)
Explanation:
From the question we are told that
The index of refraction of the glass in the fiber is ![n_f = 1.69](https://tex.z-dn.net/?f=n_f%20%20%3D%20%201.69)
The index of refraction of the glass in the cladding is ![n_c = 1.50](https://tex.z-dn.net/?f=n_c%20%20%3D%20%201.50)
The critical angle is mathematically evaluated as
![\theta_c = sin^{-1}[\frac{n_c }{n_f } ]](https://tex.z-dn.net/?f=%5Ctheta_c%20%20%3D%20%20sin%5E%7B-1%7D%5B%5Cfrac%7Bn_c%20%7D%7Bn_f%20%7D%20%5D)
substituting values
![\theta _c = 62.57^o](https://tex.z-dn.net/?f=%5Ctheta%20%20_c%20%20%3D%20%2062.57%5Eo)
Here is the answer. The microscope parts that should routinely be adjusted to control the light source and provide optimal illumination of the specimen are the following: <span>light source; condenser; specimen; objective lens; ocular lens. Hope this answers your question.</span>
-493.4138 that's what I got when you subtract 15.54 from 508.9538
<span>it either changes the direction of the object or it stops the object in motion.</span>