A 1 cm long awl pin is placed vertically in front of a concave mirror A 05 cm long image of the awl ...

Question

A 1 cm long awl pin is placed vertically in front of a concave mirror. A 0.5 cm long image of the awl pin is formed at 30 cm in front of the mirror. At what distance is the pin kept?

(Hint: magnification = I/O, Magnification = - v/u therefore, I/O = -v/u)

Accepted Answer

Answer is b 20 cm Explanation Here size of object O 100 mm 10 cm as 1 cm 10 mm Size of Image size I 50 mm 05 cm Image distance v 30 cm as image is real Let object distance u Focal length f Magnification m I Size of image OSize of object Magnification is given by m 05130 U 60cm

NCERT Exemplar Solutions Class 10 Science Solutions for Light Reflection and Refraction - Exercise in Chapter 10 - Light Reflection and Refraction