HW_4_sol

# HW_4_sol - Solution Boundary conditions E t d = E t a D n d...

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Problem: An electric field inside a dielectric makes an angle of  25 o  with the normal to  an interface between the material and air. The relative permittivity of the dielectric is 1.8.  What angle does the field make with the normal on the air side of the material?
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Unformatted text preview: Solution: Boundary conditions: E t d = E t a , D n d = D n a ( d is for the dielectric, a is for air) In air: tan q a = E t a E n a Â» E t a D n a = E t d D n d = 1 1.8 E t d E n d = tan 25 Ã— 1.8 Î¸ a = tan- 1 tan 25 o 1.8 ( ) Â» 14.5 o...
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