You can download the NCERT Solutions for Class 12 Physics Chapter 9 Ray Optics And Optical Instruments in PDF below. Prescribed textbook by CBSE for Chapter 9 Ray Optics And Optical Instruments is standard XII NCERT course book for Physics.
Question 9.1:
A small candle, 2.5 cm in size is placed at 27 cm in front of a concave mirror of radius of curvature 36 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Describe the nature and size of the image.
If the candle is moved closer to the mirror, how would the screen have to be moved?
Answer
Size of the candle, h = 2.5 cm
Image size = h’
Object distance, u = −27 cm
Radius of curvature of the concave mirror, R = −36 cm
