70.system is shown in the fig. light rays from a point obj are first deviated by a prism and then focussed by a thin lens of focal length f. the prism is made of material with refractive index 3/2 and has a small apex 2 degree ie small angle approximations are valid sin(alpha) =alpha and sin (alpha+beta)= alpha +beta where alpha and beta are angles. the final image is 1) virtual and formed at a distance of 2f from lens 2) real &formed at a distance of 2f from lens 3)real & formed at a distance of 3f/2 from lens 4) real and formed a distance of 3f from the lens

70.system is shown in the fig. light rays from a point obj are first d

1.	70.system is shown in the fig. light rays from a point obj are first deviated by a prism and then focussed by a thin lens of focal length f. the prism is made of material with refractive index 3/2 and has a small apex 2 degree ie small angle approximations are valid sin(alpha) =alpha and sin (alpha+beta)= alpha +beta where alpha and beta are angles. the final image is 1) virtual and formed at a distance of 2f from lens 2) real &formed at a distance of 2f from lens 3)real & formed at a distance of 3f/2 from lens 4) real and formed a distance of 3f from the lens
Answer» 70.system is shown in the fig. light rays from a point obj are first deviated by a prism and then focussed by a thin lens of focal length f. the prism is made of material with refractive index 3/2 and has a small apex 2 degree ie small angle approximations are valid sin(alpha) =alpha and sin (alpha+beta)= alpha +beta where alpha and beta are angles. the final image is 1) virtual and formed at a distance of 2f from lens 2) real &formed at a distance of 2f from lens 3)real & formed at a distance of 3f/2 from lens 4) real and formed a distance of 3f from the lens