2. Draw a ray diagram for the following object and lens that shows the location, magnification and type of the image created. object -optical axis f f

1. If a lens is to focus parallel light rays on a screen 50-cm away, what diopter would it have? Explain.

A pencil is placed at a distance 24 cm from the spherical mirror. A virtual image with linear magnification of 6 is observed. i. Calculate the focal length of the mirror. ii. State the type of mirror. GUTM UTM

Which of the following statements is not consistent with geometric optics.   a. Light rays propagate at small angles relative to the optical axis.   b. The diffraction of light is neglected.   c. Light rays propagate in straight lines.   d. Light rays propagate near the optical axis.   e. Ordinary objects always exhibit specular reflection when exposed to light.

A person is having nearsightedness vision defect because, a. the lens of the eye become too weak b. the eye become too long c. the eye become too short d. no vision

Which of the following scenarios does NOT result in refraction? a. The light must enter the medium parallel to the normal. b. Both the incident and refracting media must be transparent. C. The light must enter the medium at an angle > 0° with respect to the normal. d. Both substances must have different indices of refraction

72.  The image the lens of the eye forms on the retina is   A. depends on the focal point of the eye   B. real and inverted.   C. real and erect.   D. virtual and erect.   E. virtual and inverted.

1. A beam of light emitted in air strikes the surface of mineral oil at the angle of 40 degreeswith respect to the normal line to the surface. Speed of light in air is 3 x 10^8 m/s in oil light travels with speed of 2.17x10^8 m/s. What is the angle of refraction? Draw the ray diagram.

An object is 8.5 cm away from a thin convex lens with focal length of f1 = 3.1 cm. 8.0 cm away from the first convex lens is a second convex lens on the same optical axis with focal length of f2 = 2.1 cm. a) Draw a principal ray diagram for the optical system including the different focal lengths, image and object distances. b) Describe the nature (real or virtual) and orientation of the final image relative to the object. c) Calculate the position of the final image after the two lenses and its magnification.

provide justification