जब किसी वस्तु को अनंत पर रखा जाता है, तो अवतल दर्पण द्वारा किस प्रकार का प्रतिबिंब बनता है?

A concave mirror forms a real, inverted, and same-sized image of an object. The object is placed:

When light is incident on a polished surface, __________ reflection takes place.

The angle between the incident ray and the reflected ray is 80°. What will be the value of the angle of incidence?