Polarization and Light Intensity

[jisbon]

Homework Statement

A beam of unpolarized light is incident onto air from a glass with a refractive index of 1.52
Given incident light intensity has the power of 10mW, find minimum incident angle when the power of refracted light becomes zero?

Relevant Equations

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Looked upon this and can't seem to find anything.
The formula I=Icos^2theta seems to only work for polarization filters, which is not this case.
On the other hand, the brewster's angle only c.aclates the angle when the REFLECTED light is polarized, not the REFRACTED light.
Hence I am confused and will like to seek advice on this.

Cheers.

 

[haruspex]

Since it only asks about the case of zero refracted light, the polarization is barely significant. it is just removing a special case you might otherwise have had to consider.
If there is no refracted light, how would you describe where the light is going?

 

[jisbon]

Since it only asks about the case of zero refracted light, the polarization is barely significant. it is just removing a special case you might otherwise have had to consider.
If there is no refracted light, how would you describe where the light is going?

Oh when the question means the power of refracted light becomes zero, it means it is completely reflected? Which means total internal reflection?

 

[haruspex]

Oh when the question means the power of refracted light becomes zero, it means it is completely reflected? Which means total internal reflection?

That's how I read it.