परावर्तन के नियमों के अनुसार, जब एक चिकनी सतह से परावर्तन कोण 60° होता है, तो आपतन कोण कितना होता है?

If the angle between the reflecting surface and the incident ray is 30°, then what is the angle of reflection?

What is the nature of the image formed by a convex mirror when the object is placed at infinity?

When an object is placed at the centre of curvature (C) of a concave mirror, what is the nature of the image formed?