The angle of incidence from air to glass at the point O on the hemispherical glass slab is. A. 45° B. 0° C. 90° D. 180°
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45° (45degree)
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The angle of incidence from air to glass at point O on hemispherical glass slab is B. .
Explanation:
- Angle of incidence is the angle made by incident ray with the normal on the interface of two mediums.
- Normal is a line perpendicular to the surface interface.
- The angle of incidence here is 0 degrees as the incident ray is along the normal of the hemispheric surface.
- There is no refraction when the ray enters the glass slab, which shows that the incident ray is perpendicular to the surface interface.
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