Why is infrared spectrophotometry a good method for identifying a pure chemical substance, whereas UV-visible spectrophotometry is seldom used for this purpose?

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: The paint used to make lines on roads must reflect enough light to be clearly visible at night. Let…

A: (a) The degree of freedom =n-1=19-1=18 It is a right-tailed test. So the p-value= P(t with df=18…

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

A: Given: electron microscope , optical microscope

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 is the difference between a photocell and a photodiode?

A: Photocell: It is Light Dependent Resistor 'LDR'. This device is based on photovoltaic effect or…

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: Should a fire (T = 1000 K) emit more radiation at 5 micron wavelength or at 15 micron wavelength?…

A:

Q: Which statement is Not correct resonance emission has exact amount of absorption energy IR needs…

A: resonance emission does not have has an exact amount of absorption energyIR does not need…

Q: During this time, how many photons are emitted by the laser?

A:

Q: What does absorption measure in its applications? a.) The intensity of light emitted from a sample.…

A:

Q: Why Powdered technique is popular in x-ray crystallography?

A: In X-ray crystallography, the structure of a material is studied with the aid of X-rays. When the…

Q: In what specific way does light from distant stars and galaxies tell astronomers that atoms…

A: Every element emit a specific light which contain a specific wavelength. The different element have…

Q: Ordinary glass is transparent to visible light but largely opaque to ultravioletradiation. Why?

A: Based on a material's composition and property, a specific wavelength or a range of wavelengths…

Q: Define absorption coefficient?

A: We know that, Absorption coefficient : When light passes through a given substance then the…

Q: e the types of absorption take place in the infrared, microwave and UV

A: The principle of absorption spectroscopy refers to the quantity of light absorbed by a solution or…

Q: Approximately what percentage of the initial fluorescence intensity remains after 3 lifetimes 5% 13…

A: Given:

Q: Which samples DO NOT exhibit photoelectric effect? A. Digital Camera B. Solar Cell C. Light Sensor…

A: The photoelectric effect is the liberation of electrons from a substance exposed to electromagnetic…

Q: Use Stefan's law to calculate the to- tal power radiated per unit area by a tungsten filament at…

A: Temperature (T) of tungsten filament= 2090 kStephan boltzmann constant (σ) = 5.6696×10-8 Wm2-k4Power…

Q: What are the requirements of samples used for AA/AE, X-Ray methods, and UV-Vis spectroscopy

A: Answer:-  AE spectroscopy :- AE spectroscopy excites atoms from the heat of a flame to emit light.…

Q: When ultraviolet light falls on certain dyes, visible light is emitted. Why does this not happen…

A: Given: When ultraviolet light falls on certain dyes, visible light is emitted. Why does this not…

Q: Why does a sodium street lamp give off a different color light than a neon light?

A: Sodium street lamp gives off yellow color, while a neon light gives of a red color.

Q: which photons would create 3.5 volts in a solar cell?

A: The photons carries some energy. When photons are absorbed, they hit the electrons and transfer…

Q: Neon works in two wavelengths, how do we control it and make it work in one wavelength?

A: Real neon lights consist of  glass tube filled with a small amount (low pressure) of neon gas. Neon…

Q: The most common continuous Spectrums to describe sea 5tates are 2)

A: A continuous spectrum is one that has no visible interruptions or gaps across its wavelength range…

Q: What is photodiode?

A: A photodiode is a semiconductor device which converts light energy into electrical energy. An…

Q: The first laser consisted of a red ruby rod activated by a photoflash tube that emitted green light.…

A: The energy of a photon depends on its wavelength. As the wavelength increases, the energy of the…

Q: Have you ever watched a fire and noticed that the burning of various materials often produces flames…

A: The color of the flame depends on several factors, and the most important among them are black body…

Q: What accounts for the difference in penetration ability with regard to the type of emission and the…

A: Different Types of radioactive emission: Alpha rays Beta rays Gamma rays

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: How much energy will a 2.5 W laser use in 12 seconds?

A: Power , P = 2.5 W  Time , T = 12 seconds  To find = Energy used

Q: Why is an electron microscope more suitable than an optical microscope for “seeing” objects of…

A: An optical microscope enlarges an object which produce the light in the wavelength of visible range.…

Q: Silver bromide (AgBr) is a light-sensitive substance used in some types of photographic film. To…

A: Photographic crystals are photosensitive. Thus, when light rays of sufficient energy fall on it,…

Q: Which puts out the greater percentage of its energy as light, an incandescent lamp or a mercury…

A: An incandescent lamp is a bulb that produces electric light by heating a wire filament at high…

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

A:

Q: Why is ultraviolet light , but not infrared light , effective in making certain materials…

A: The materials which absorb the photons of higher energy and re-emit the photons of lower energy are…

Q: Suppose you measure spectrum of a 40W incandescent light bulb which peaks at a wavelength of 576 nm.…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: How does the lifetime of a typical LED compare with that of an incandescent bulb?

A: In an incandescent bulb, it has a burning filament that produces heat in addition to light which…

Q: Does atomic excitation occur in solids as well as in gases? How does the radiant energy from an…

A: Radiant energy is the form of energy that emits in the form of electromagnetic waves. The various…

Q: Why is light pure energy? Give me 2 summary paragraphs.

A: Light energy is a kind of kinetic energy with the ability to make types of light visible to human…

Q: When ultraviolet light shines on glass, what does it do to electrons in the glass structure?

A: Ultraviolet light is the light having wavelength less than the violet color's wavelength. It has…

Q: How do the elements exhibit a range of band gaps?

A: When we talk of semiconductors and insulators, electrons are observed to be restricted to a number…

Q: Why can atoms not be seen with a powerful optical microscope?

A: Atoms cant been seen with an optical microscope because the size of the atoms is smaller than the…

Q: What is an average time interval of release of the fluorescence by an excited molecule? Select one:…

A: Required  average time interval of release of the fluorescence by an excited molecule

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.