Can anyone help me with questions a and c​

A) what is the refractive index of the glass prism

➡1.5

The refractive index of glass is 1.5. The minimum angle of deviation for an equilateral prism along with the corresponding angle of incidence is desired. If the minimum angle of deviation of a prism of refractive index 1.4 equals its refracting angle, the angle of the prism is desired.

B) what is meant by critical angle

➡Critical angle, in optics, the greatest angle at which a ray of light, travelling in one transparent medium, can strike the boundary between that medium and a second of lower refractive index without being totally reflected within the first medium.

C) calculate the critical angle of the glass prism

➡The critical angle can be calculated by taking the inverse-sine of the ratio of the indices of refraction. The ratio of nr/ni is a value less than 1.0.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

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