At what angle should a ray of light fall on a flat surface of ice for the refracted ray to form a right angle with the reflected ray?

The angle between the incident beam and the reflected

A = An + Ao.

According to the law of light reflection, the angle of incidence is equal to the angle of reflection, which means you can write

A = 2 * Ap.

From the formula, select and calculate the required

Ap = A / 2;

Ap = 90/2 = 45.

Answer: The beam should fall at an angle of 45 degrees.

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