Question

Q18 A point object is kept at a distance of 15 cm in front of concave mirror having radius of curvature
30 cm. The image formed
a. At focus
b. At center of curvature
c. Between focus and centre of curvature
d. At infinity​

Answer 1

Answer:

option d. at infinity

Explanation:

• distance of object 'u' = 15 cm

• radius of curvature of concave mirror = 30 cm

• so, focus of concave mirror = 30/2 = 15 cm

• object is placed at focus

• so, image is formed at infinity

REASON

• see the ray diagrams in image

• so, the answer is option d. at infinity

hope this answer is helpful to you