Question

1. (5 marks) The image shows a glass rod that is partially inside a liquid. The part of the rod that is inside the liquid is invisible. Why? Explain clearly 2. (5 marks) Suppose an object is placed 6 cm in front of a converging lens (convex lens) with a focal length of 10 cm. Determine: a) the distance between the image and the object. b) the magnification and the image properties (real/virtual, inverted/upright, larger/smaller).

Answer 1

Sol" The part of the rod that is inside the liquid is invisible because we are puting glass nod in Water and glass & Water having same refractive inder in this serveriosa Secenerio . We know that the optical phenomena 'reflection $ refraction' observed due to refractive index with differentiability but here refractive indexs are some then mo refraction or reflection occurs and Our eye can't see that obirect thus the object became invisible. CA (2) Given for convea lens u=-6em. __ f = 10 cm From lens Formula 1 -1 = 1 - lets put Nalues - t + t = t. to tanto 6-10 --I sem Golo -)Scm 10 6 60 V=-1 sem (a) distance between image $ object (d) -- Td = gem (distance always in positive) (6) magnification (M) ET DE SETERUS M22.5 Image properties : magnified, upzight, Virtual 40),