An object is 200 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:; A) less than 200 mm; B) between 200 mm and 400 mm; C) exactly 400 mm; D) more than 400 mm
Answers
Answer:
D) more than 400 mm
Explanation:
As given in the question,
the distance of the object from mirror = 200 mm
Since the image formed of this object is upright (erect image) and we have to calculate the radius of curvature of the given concave mirror.
As according to characteristics of the concave mirror the image formed is erected only when the object will be between the vertex and focal length of the mirror.
Hence, according to given data in question, the object is between focus and vertex of the mirror at a distance of 200 mm. so the length of focus will be more than 200 mm and as we know the radius of curvature of a concave mirror is double of its focal length.
So, the measurement of the radius of curvature of a given concave mirror will be more than 400 mm.