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2. LED Iluminator. An LED emits a 20° full-angle cone-of-light. The detector has a 10° full...
An individual white LED (light-emitting diode) has anefficiency of 20% and uses 1.0 W of electric power. a) How many LED...
An individual white LED (light-emitting diode) has anefficiency of 20% and uses 1.0 W of electric power. a) How many LEDs must be combined into one light sourceto give a total of 1.6 W of visible-light output (comparableto the light output of a 40 W incandescent bulb)? b) What total power is necessary to run this LED lightsource?
Problem 11.4 An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0...
Problem 11.4 An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0 W of electric power. Part A How many LEDs must be combined into one light source to give a total of 3.8W of visible-light output (comparable to the light output of a 100Wincandescent bulb)? Express your answer as an integer. N = SubmitMy AnswersGive Up Part B What total power is necessary to run this LED light source? Express your answer to one significant...
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a p...
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a peak inverse voltage rating of 5 V. i) Draw the circuit dingram of the arrangement you will use to light the LED to full brightness. (ii What is the value of the resistor you will use in your...
1.) A double-concave lens focal length -20 cm has an object placed at a distance of...
1.) A double-concave lens focal length -20 cm has an object placed at a distance of 30 cm in front of it. How far from the mirror is the image formed? On what side of the lens is the image formed? What is the magnification? Is the image real or virtual? Upright or inverted? 2.) The second order fringe is located 5-cm from the central fringe when formed by a 10 lines/mm diffraction grating on a screen 5 meters away....
please do all the questions will full working answers *Question 186: Refraction/Snell's Law The index of...
please do all the questions will full working answers
*Question 186: Refraction/Snell's Law The index of refraction of water is 1.33. What is the angle of refraction of a beam of light hitting the water surface at an angle of 30 degrees with the normal and entering the water? Select one: a. 53.1 degrees b. 67.9 degrees c. 22.1 degrees d. 40.6 degrees e. 10.2 degrees *Question 197: Critical Angle A diamond (refractive index 2.46) is placed in water (refractive...
(15) A diver has decided to go for a night dive. Unfortunately, the crew of another...
(15) A diver has decided to go for a night dive. Unfortunately, the crew of another small dive boat has ignored the warning floater and decided to drop an anchor in the immediate vicinity. While the diver was distracted by marine life, the diver's foot was pinned under the anchor and wedged against a rock. To escape, the diver must signal an SOS to the boat above using a powerful, but narrow beam, dive light. The diver's depth gauge reads...
0044130 10335 Physics 1201 Spring 19 Section 10:20 Kural Midterm2 Wed 03/27/19 Page 4 of 6...
0044130 10335 Physics 1201 Spring 19 Section 10:20 Kural Midterm2 Wed 03/27/19 Page 4 of 6 Name: Recitation Instructor Name (write on every paga) write on every page) 20 cm Show Work: Page 1 1) A converging lens (fc- 30cm) is 20 cm behind a diverging lens (fo- -10cm). A light ray (parallel to_ the axis) strikes the diverging lens as shown. After passing through the converging lens, the light ray is again parallel. Mark the position of the focal...
5. .... carries the greatest amount of energy a) X-rays b) gamma rays c) visible light...
5. .... carries the greatest amount of energy a) X-rays b) gamma rays c) visible light d) infrared rays 6. The E. and B fields in electromagnetic waves are oriented a) parallel to the wave's direction of travel, as well as to each other. b) parallel to the waves direction of travel, and perpendicular to each other. c) perpendicular to the wave direction of travel, and parallel to each other. d) perpendicular to the wave's direction of travel, and also...
Partner: Date Name 11 Snell's Law Introduction When light passes from one material to another it ...
Partner: Date Name 11 Snell's Law Introduction When light passes from one material to another it is always bent away from its original path. This process is known as refraction and the change in direction depends on the change in optical density (or refractive index) of the two materials. A larger change in refractive index results in a larger change in angle between incoming and outgoing light beams. A light beam bends closer to the normal in the material with...
Question #5 (20 pts) A pinion has 18 teeth and a diametral pitch of 9 teeth/in, a face width of 1,5 in sa pressure angle of 20° with full-depth teeth. The spur gear is made by the milling or emi...
Question #5 (20 pts) A pinion has 18 teeth and a diametral pitch of 9 teeth/in, a face width of 1,5 in sa pressure angle of 20° with full-depth teeth. The spur gear is made by the milling or emin required to transmit at least 11 hp horsepower with a corresponding speed and moderate applications. Which material is the best choice for the spu ones in Table 5 considering the maximum allowable bending stres (factor of safety, nd-2.5)? U quations...
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a peak inverse voltage rating of 5 V. i) Draw the circuit dingram of the arrangement you will use to light the LED to full brightness. (ii What is the value of the resistor you will use in your...
please do all the questions will full working answers
*Question 186: Refraction/Snell's Law The index of refraction of water is 1.33. What is the angle of refraction of a beam of light hitting the water surface at an angle of 30 degrees with the normal and entering the water? Select one: a. 53.1 degrees b. 67.9 degrees c. 22.1 degrees d. 40.6 degrees e. 10.2 degrees *Question 197: Critical Angle A diamond (refractive index 2.46) is placed in water (refractive...
(15) A diver has decided to go for a night dive. Unfortunately, the crew of another small dive boat has ignored the warning floater and decided to drop an anchor in the immediate vicinity. While the diver was distracted by marine life, the diver's foot was pinned under the anchor and wedged against a rock. To escape, the diver must signal an SOS to the boat above using a powerful, but narrow beam, dive light. The diver's depth gauge reads...
0044130 10335 Physics 1201 Spring 19 Section 10:20 Kural Midterm2 Wed 03/27/19 Page 4 of 6 Name: Recitation Instructor Name (write on every paga) write on every page) 20 cm Show Work: Page 1 1) A converging lens (fc- 30cm) is 20 cm behind a diverging lens (fo- -10cm). A light ray (parallel to_ the axis) strikes the diverging lens as shown. After passing through the converging lens, the light ray is again parallel. Mark the position of the focal...
5. .... carries the greatest amount of energy a) X-rays b) gamma rays c) visible light d) infrared rays 6. The E. and B fields in electromagnetic waves are oriented a) parallel to the wave's direction of travel, as well as to each other. b) parallel to the waves direction of travel, and perpendicular to each other. c) perpendicular to the wave direction of travel, and parallel to each other. d) perpendicular to the wave's direction of travel, and also...
Partner: Date Name 11 Snell's Law Introduction When light passes from one material to another it is always bent away from its original path. This process is known as refraction and the change in direction depends on the change in optical density (or refractive index) of the two materials. A larger change in refractive index results in a larger change in angle between incoming and outgoing light beams. A light beam bends closer to the normal in the material with...
Question #5 (20 pts) A pinion has 18 teeth and a diametral pitch of 9 teeth/in, a face width of 1,5 in sa pressure angle of 20° with full-depth teeth. The spur gear is made by the milling or emin required to transmit at least 11 hp horsepower with a corresponding speed and moderate applications. Which material is the best choice for the spu ones in Table 5 considering the maximum allowable bending stres (factor of safety, nd-2.5)? U quations...
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