In a CRO, the assembly of the intensity grid, focus grid, and accelerating anode is called an electron gun.

Q: p glows red because

A: A neon lamp glows red because

Q: A light-emitting diode made of a semiconductor material with a refractive index of 3.77 that emits…

A: If angle of incidence is greater than critical angle then total internal reflection takes place.

Q: Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near…

A: Wavelength of red light(λr)=659 nm=659×10-9 m......(1)Wavelength of an infrared light(λi)=979…

Q: Which of the following statement for the RGB LED provided for lesson 4 are true? Select all that…

A: RGB LED stands for red, blue, and green LED s. This RGB LED combines all these three colors to…

Q: If light were passed through a round hole instead of a thin slit in a spectroscope, how would the…

A: A spectroscope is a device used in measuring wavelength and energy of the light wave. This is done…

Q: Which microscope is often used to view metal surfaces? A) Optical microscopes B) Scanning tunneling…

A: Microscopy is the science of examining tiny objects and structures using a microscope. Microscopic…

Q: What principal advantage does an electron microscope have over an optical microscope?

A: Given: electron microscope , optical microscope

Q: Which of the following is not a distinct characteristic of a laser light? monochromatic coherent…

A: Major difference between laser light and light generated by white light sources is that laser is…

Q: Consider the figure below: dentify the value of Pif angle a = 49° and ß = 34° when C=75 Ib.in.…

A: Write the given values of this problem. α=49°β=34°C=75 lb

Q: What would you get if you mix M, Y, and C lights?

A:

Q: What makes the light waves in laser light parallel?

A: Lasers light are light beams that are powerful enough to travel miles into the sky and cut through…

Q: When an electron moves from n-region to p-region, what is generated in the two region

A: To find the electrons moves from n region to p region

Q: Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near…

A: (a)   The frequency of the given red light can be calculated as,

Q: Why are LEDs the lamp of choice in hard to get to places such as high ceilings?

A: as compared to other type of lamps, led lamps hace high durability with  long life periods.…

Q: Tunnel effect is notably observed in case of

A: Tunneling effect is primarily associated with quantum mechanics.  It so happens that a particle with…

Q: We usually associate fluorescence with ultraviolet light— objects glow under “black light.” But it’s…

A: We usually associate fluorescence with ultraviolet light objects glow under "black light" But it's…

Q: The current in a certain 4-band resistor is 22 mA when the voltage is 18 V. The color bands are…

A:

Q: How do fluorescent soap residues make clothing look “brighter and whiter” in outdoor light? Would…

A: Outdoor light is mainly the sunlight coming from the sun. When the fluorescent soap residues expose…

Q: The purpose of choke in tube light is?

A: When the switch is ON, in a tube light choke is nothing but the coil/ballast ( inductor) which is…

Q: Show the proccES in deriuing V2f tor moving target involuing elustic colligon.

A: We need to derive the equation for final velocity of the target in an elastic collision.

Q: Name five salient features of a stationary anode X-ray tube.

A: Answer: Salient features of stationary anode x-ray tube: (1) Poor heat loading, (2) Low powered…

Q: In a fiber-optic link, most of the distortions are generated by the LASER photodiode. True False

A: Distortion It is denoted that the something which is deviated from their original value.

Q: Plot the forward characteristics of each LED (each color) on the same graph.

A:

Q: What name is given to the region where all the colors that can occur in the LEDS are located? 1.…

A: Given that - What name is given to the region where all the colors that can occur in the LEDs are…

Q: In an optical fiber, is not a transparent medium. Select one: O a. coating O b. cladding core O d.…

A: Option (a) is correct.

Q: SOLVE KIR 42 12=0.97A 9. a 1052 1さん 102 18

A:

Q: A low-power laser used in a physics lab might have apower of 0.50 mW and a beam diameter of 3.0 mm.…

A: The power, P=0.50 mW=0.50×10-3 W   The circular area, S=πr2

Q: Look up the diameter of a silicon atom, in Å. The latestsemiconductor chips have fabricated lines as…

A:

Q: Why does a fireplace poker appear black when not in the fire and red, yellow, or white when left in…

A:

Q: Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near…

A:

Q: xis is the electric field produced by the particle

A:

Q: Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near…

A:

Q: Which one of the following is a unique property of LASER Select one: O a. Monochromaticity b.…

A: Which one of the following is a unique property of LASER

Q: The focal spot is used to focus electrons into a wide region of the target. * O False O True

A: The area of the anode surface which receives the beam of electrons from the cathode is known as the…

Q: IIR = IF Rs Series Led's KIKIK

A: Given, Potential drop across LED V = 1.2 V the current is given as: Is = 10 mA all the LED are in…

Q: What is the principle of LED?

A: A light-emitting diode has a two-lead semiconductor light source. It is a p–n junction diode.

Q: What is electron emission?

A:

Q: A cloud of 〖"2.5x10"〗^19 electrons move past a given point every 2 seconds. How much is the…

A:

Q: A sample of Fe, like many materials, expands as it is warmed. What will happen to the size of the…

A: Diffraction Pattern:- Diffraction of light, as it is used to describe light, occurs more explicitly…

Q: A crystal diamond is immersed in ethyl alcohol. If you my flight is traveling in the diamond and…

A: (a) Using Snell’s law n2sinβ=n1sinαβ=sin-1n1sinαn2β1=sin-12.42sin20°1.36=37.48° The ray is refracted…

Q: Difference between (Half-Wave Rectifier and Full-Wave Rectifier)

A: Rectifier: A rectifier is an electrical device that converts an oscillating two directional…

Q: 1. Solve for la, la, lc, o, and ltetal. 10 Ω 20Ω (20 V 30 Ω Is 40 1 50 A 60 Ω 70 Ω 30 V (40 V 80 2…

A:

Q: The wavelike properties of electrons are useful in: A) Magnifying objects B) Lasers C) Weather…

A: