A small object is placed 20 cm from the first of a train of three lenses with focal lengths, in order, of 10, 15, and 20 cm. The first two lenses are separated by 30 cm and the last two by 20 cm. Calculate the final image position relative to the last lens and its linear magnification relative to the original object when (a) All three lenses are positive (b) the middle lens is negative (c) the first and last lenses are negative. Provide ray diagrams for each case.

You have a telescope that consists of two converging lenses which are placed a distance apart which is approximately equal to the sum of their focal lengths. Focal length 1 is appriximatly 5.5cm and focal length 2 is approximatly 25cm.  The lens closest to the onject should have a resonably long focal length and the eyepiece lens should have a relatively short focal length to get good magnification.   a. draw a scale ray diagram for a telescope using one long and one short focal length lens. b. Estimate how much larger your distance object appears through your telescope and then calculate the angular magnification.

Convert these to isometric. These are squares (Same length each sides),

Q. 2. A Figure 2 shows an isometric view of an object. Draw to a full size scale the following views in first angle projection. (a) Sectional front view, (b) Top view and (c) Sectional side view 40 SQ. Through holes 60 60- 60 180 B. 0. 30 1515

These images show one of the large `VLT’ telescopes at the European Southern Observatory’s facility at Cerro Paranal, Chile. The place where the laser beam comes out (seen in the inset photo) is just out of sight off of the top edge of the large photo. Also note that if you look down the telescope tube (in the main photo), you can see the tube’s front-end structure. Why is there a laser beam shooting out of the front of this telescope (in the inset picture)? Group of answer choices The beam creates an `artificial star’, which is used by an adaptive-optics system to measure (and counteract) the blurring effect of Earth’s atmosphere. The astronomers are bouncing light off of objects near the center of the Milky Way galaxy, to measure their distances from Earth. The astronomers are taking pictures of the surface of a planet (most likely Mars), and the laser allows them to light up the planet’s surface with a very specific color of light. The astronomers are engaged in the opening…

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dzi Through hole 18 16 28 20 44 20 Dia 62 17R 25 50 Through hole

11:02 AM Sat Oct 3 a 65% T + : 0 QUANTITY 875 MATERIAL MALLEABLE IRON SCALE NOT TO SCALE DRAWN BY ProfDesCo DATE FEED HOPPER А-11 (TOP) S 2.00 1.40 44 44 .56 (SIDE) 1.50 B- 3 4 Page 3 of 3

Please could I have the solutions for this question in a step-by-step form. Thank you very much.

The speed of sound in air is 340 m/s, and the speed of light is 3.0 X 108 m/s. What frequency oflight has the same wavelength as a 200.0 Hz sound wave?