When light is incident at polarizing angle, which one is completely polarized ?

Options

A. Reflected light
B. Refracted light
C. (a) and (b) both
D. Neither (a) and (b)

Explanation

To solve the question of which light is completely polarized when light is incident at the polarizing angle, we can follow these steps:

### Step 1: Understanding Polarizing Angle
The polarizing angle (also known as Brewster's angle) is the angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection. At this angle, the reflected light is completely polarized.

### Step 2: Incident Light
When unpolarized light strikes a surface at the polarizing angle, it can be separated into two components: one that is reflected and one that is refracted.

### Step 3: Behavior of Reflected Light
The light that is reflected at the polarizing angle becomes polarized. Specifically, the reflected light is polarized parallel to the surface of the medium. This means that the electric field vectors of the reflected light waves oscillate in a plane parallel to the surface.

### Step 4: Behavior of Refracted Light
The refracted light, on the other hand, is not completely polarized. It retains some degree of the original unpolarized characteristics because it is transmitted into the second medium.

### Step 5: Conclusion
From the analysis, we conclude that when light is incident at the polarizing angle, the reflected light is completely polarized, while the refracted light is not.

### Final Answer
The reflected light is completely polarized.

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