2-When working with high-power lasers, why is it necessary to use a beam expander made of a negative and a positive lens rather than one made from two positive lenses? Use accurately drawn ray diagrams to help explain your answer.

Design an eye for a(n) using a concave spherical mirror such that the image of an object 1.0 m tall and 10 m away fully fills its 1.0-cm square photosensitive detector (which is movable for focusing purposes). Where should this detector be located with respect to the mirror? What should be the focal length of the mirror? Draw a ray diagram.

i) The critical angle for carbon disulphide is 37.897° when surrounded by air. (a) construct the ray diagram, (b) evaluate the RI of the carbon disulphide and (c) evaluate the speed of light in carbon disulphide. ii) In a thermodynamic process, the pressure of a fixed amount of gas is changed so that the gas takes 30 joule of heat and 10 J of work is done by the gas (gas is expanded). If the initial internal energy of the gas is 25 J, estimate its final internal energy.

3-The laser cavity length is 1 m. At one end a concave mirror with radius of curvature of 1.5 m. At the other end a convex mirror with radius of curvature of 10 cm. Find if this cavity is stable.

x 10:30 PHY 206 LAB Ray Trac... PDF - 221 KB Purpose The purpose of this activity is to use the 3 special rays to determine the images created by lenses. Introduction The purpose of ray tracing is to create a geometrical viewpoint of the creation of an optical image using the principles of ray (geometrical) optics. If done to scale, we can determine the properties of the image (size, position, real or virtual, etc.) created by different optical elements. While all rays from a given point on an object are focused by a lens to a unique point on the image, there are special rays whose properties are easy to remember and draw. For lenses, there are three special rays: a. A ray initially parallel to the axis refracts through the far focal point. b. A ray that enters the lens along a line through the near focal point emerges parallel to the axis. c. A ray through the center of the lens does not bend. Draw the object as an arrow with its base on the axis. Draw the three special rays from the…

11:19 Optics.pdf -> 2. Find angle ø. (Hint: Use Geometry skills.) 79.4712° Air, n, = 1 3. Find the second angle of 30 incidence. 10.5288° Horiz. ray, parallel to 4. Find the second angle of refraction, 0, using Snell's Law 15.9° base Glass, n = 1.5 Refraction Problem #2 Goal: Find the distance the light ray displaced due to the thick window and how much time it spends in the glass. Some hints given. 20° 0, 1. Find 0. 20° H,0 2. To show incoming & outgoing rays are parallel, find 0. 20° n, = 1.3 3. Find d. 0.504 m glass 10m 4. Find the time the light spends in the glass. n = 1.5 5.2 · 10-8 s Extra practice: Find 0 if bottom medium is replaced with air. H,0 26.4° Refraction Problem #3 Goal: Find the exit angle relative to the horizontal. 0 = 19.8° 36 air glass The triangle is isosceles. Incident ray is horizontal, parallel to the base.

A 1.80 m tall person develops the ability to shoot a red (A= 685 nm in air) laser from their eyes (located 10 cm below top of their head). Standing at the edge of a 5.00 m wide and 2.30 m deep pool the person aims the laser at the center of the pool. al Determine where the laser bean hits the bottom of the pool from the edge (Ax). h-10.0cm w/2 Ar b) What is the wavelength and speed of the laser light in the pool?

Background: A group of physics students are playing with lasers.  The laser they have decided to use emits a 400 nm wavelength of light. Question 19: This laser light bounces from a mirror, continues through air, n = 1.0, to a piece of glass, n = 1.5, at an angle of 25° from the normal.  What will be the lasers refracted angle inside the glass?

To focus X rays, such as those collected in the Chandra X–Ray Observatory, it is necessary to use   a. a lens.   b. a concave glass mirror, such as that used in an optical reflecting telescope.   c. a metal dish, such as that used in a radio telescope.   d. grazing incidence optics shaped like a converging, hollow tube.   e. a mesh of conducting wires.

Problem 99. A) How is a good single-lens camera (one that can be "focused") able to take clear pictures of objects that are a variety of distances from the camera? B) How is the eye able to place clear images on the retina of objects that are a variety of distances from the eye? C) For a fixed focus camera to take clear pictures, the object distance must satisfy a certain inequality. What is this inequality? D) Why does the nearpoint increase as people age?