Distinguish between the primary and secondary excitation processes that occur in fluorescent lamp.

Q: for the first question the pith ball was made out of aluminum so wouldnt it become polarized and…

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Q: medical applications make use of the electromagnetic spectrum

A: We use electromagnetic spectrum in magnetic resonance imaging (MRI), radio frequency ablation (RFA)…

Q: How can an insulator be polarized?

A:

Q: Security threads have been added to Canadian bills to help detect counterfeit money. These threads…

A: Wavelength emitted = 390 nm to 565 nm

Q: Distinguish between fast and slow frequency hopping spread spectrum with a suitable example in…

A: Slow frequency hopping Slow frequency hopping is used to minimize the effects of interference from…

Q: In an optical fiber, the light is totally internally reflected at, boundary. Select one: O a.…

A: answer) option(b) core cladding

Q: Fluorescent lights tend to emit less of what color?

A: A Fluorescent tube is a low pressure mercury vapour gas discharge lamb that used the property of…

Q: dipole aerial. As the student stands up and walks towards the TV he can observe that the signal…

A:

Q: Give an example of a carrier wave, how is it generated?

A: A carrier wave is a continuous electromagnetic radiation having constant frequency and amplitude…

Q: waves

A: Electromagnetic wave waves are a propagating pair of electric and magnetic field components, and the…

Q: Electromagnetic by wavelength. waves are not part of a spectrum and are categorized O True O False

A: False

Q: What do you mean by carrier wave?

A: Carrier wave is a continuous form of electromagnetic radiation which possesses magnitude of constant…

Q: What is the color of the peak frequency of solar radiation?

A: Peak frequency is defined as the maximum energy frequency. For example, the audio tones secured in…

Q: A student is watching a TV that is receiving a signal though an in-house dipole aerial. As the…

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: Describe Microwaves.

A: Electromagnetic waves are waves which formed due to vibration between electric and magnetic field.…

Q: Unpolarized light is sent through a polarizer with its polarization axis vertical.

A: We have to use the Malus's law

Q: To keep chickens warm in a chicken coop, why would a CFL be a poor choice compared with an…

A:

Q: How can a person detect infrared rays without an instrument?

A:

Q: How fast would light travel through a material with a dielectric constant of 6 and a relative…

A:

Q: List in a table the energy, wavelength and frequency for the seven sub-regions of the visible…

A:

Q: Compared to wavelengths of visible light, the wavelengths of Ultraviolet light are

A: Shorter

Q: Suppose a 490 nm wavelength of light enters your eyes, what receptors in retina of your eyes will be…

A: Range of blue color wavelength: 440 nm to 490 nm Range of green color wavelength: 490 nm to 570 nm…

Q: nce of 10002 and two lamps L1 an

A: 0.056 watts

Q: Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of…

A: The intensity of the laser beam is, I=PA=Pπd22=4Pπd2 Substituting the values, I=40.250×10-3 Wπ1×10-3…

Q: What is the difference between a light wave and a microwave?

A: Light wave or visible light and microwave are electromagnetic waves. Both of them travel with the…

Q: Calculate the energy in eV corresponding to the 510 nm of light inside a medium refractive index…

A:

Q: Combing your hair leads to excess electrons on the comb. How fast would you have to move the comb up…

A:

Q: Compare and contrast the meaning of the prefix “micro” in the names of SI units in the term…

A: To determine: Comparing the meaning of the prefix “micro” in SI units in the term microwaves

Q: What is the practical application of x-ray, UV radiation, and how does fiber optics improve…

A: Practical applications of X rays:  1. In broken bones: A photographic film is placed behind the body…

Q: What electrical conditions are required for two light globes to produce the same brightness?

A: The expression for the power,

Q: Give benefits and risks of electromagnetic radiation

A: To illustrate the benefits and risks of electromagnetic radiation.

Q: The number of polarization modes of phonons: O a. depends on the types of atoms available. In the…

A: Required : Number of polarization modes of phonons.

Q: What will happened if you hold a polarized sunglass in front of you and rotate them. While looking…

A: Given;- What will happened if you hold a polarized sunglass in front of you and rotate them. While…

Q: How can infrared radiation be detected?

A: Infrared radiation is emitted by all living organisms in the form of heat . Although our eyes cannot…

Q: Discuss the advantages of optical fibers over conventional copper cables.

A: The various advantages are

Q: what waves are the only part of the electromagnetic spectrum that the human eye can see ?

A: Light is an electromagnetic radiation which creates a sensation of vision

Q: The package of a fluorescent bulb for a table lamp lists the light output in termsof lumens, lm.…

A:

Q: A photon striking a solar cell can set one electron in motion in a circuit. For a particular solar…

A: Given data: Energy delivered to a circuit by each electron is, E=0.5 eV.

Q: what is the name of the quanitity that is a measure of how much an insulator can polarize?

A: The electric susceptibility is a quantity that measures how much an insulator can polarize. It…