Aglass planoconcave lens has one flat [planar] surface and one (spherical) concave surface as shown. The focal point of the lens is 37 cm from the lens along the optical axis and the index of refraction of the glass is 1.4. What is the magnitude of the radius of curvature of the curved face. IRI? An swel: Choose... 3 Check Planoconcave \fRefer to the previous problem about the glass hemisphere in a fluid. The beam of light enters the flat surface at the exact centre of the glass hemisphere, and exits the glass at the point P. What is the angle of refraction as the light enters the fluid at P? Select one: O OOOOOO $1 $2 90" $1 90" $2 0.0\" 90" total internal reflection occurs at point Pr so the light does not enter the uid cross out cross out cross out cross out cross out cross out cross out An object is placed on the central axis of a thin converging lens. at a distance of 30 cm from the lens. The magnitude of its focal length is |f|= 12 cm. What is the linear magnification, M. of the resulting image? Answer: 0.2 86 8 Check An object is placed on the central axis of a thin lens. at a distance of 15 cm from the lens. The linear magnification of the resulting image is 0.21. What is the focal length. f for this lens? Answer: 2.60 X cm 0 Check