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Solid State Physics
Solid State Physics is the branch of physics that deals with the physical properties of solid materials, especially the electromagnetic, thermodynamic, and structural properties of crystalline solids.
813 Questions
Why do value of absorbance have no units?
Absorbance is a dimensionless quantity defined as the logarithm of the ratio of incident light intensity to transmitted light intensity. Since it is a ratio of like quantities (intensities), the units cancel out, leading to a unitless measurement. This makes absorbance a convenient measure for comparing the amount of light absorbed by a substance without being dependent on the specific units of the light intensity.
What is the force exerted by the object you are trying to move?
The force exerted by an object you are trying to move is its weight, which is equal to the mass of the object multiplied by the acceleration due to gravity (9.8 m/s^2 on Earth). The force needed to move the object must be greater than or equal to its weight to overcome friction and inertia.
Draw and explain the v-i characteristics of a p-n junction?
As you can't draw here, see link.
- In the forward bias voltage direction (right side) current slowly rises until the knee is at 0.7V in silicon diodes (0.2V in germanium diodes), then current rapidly rises. The forward biased V:I curve closely approximates an exponential function.
- In the reverse bias voltage direction (left side) current stays constant at near zero, until the breakdown voltage is reached then jumps to a high value.
Is sulfera non-metallic element?
Yes, sulfur is a non-metallic element that is commonly found in nature. It is classified as a non-metal on the periodic table due to its chemical properties and behavior in chemical reactions.
Do the longitudinal waves convert in to transverse waves in liquids?
ans:
interesting question:
I thought about it, and initially thought not, but then thought "what about the surface of the liquid?"
If you strike the surface with a pushing force, the surface will oscillate in a transverse motion.
I believe the answer is yes!
Today radium has only limited applications in research laboratories, for example for the preparation of radon standard solutions, in neutron sources of the type Ra-Be, etc.
Possible use in radiotherapy of some cancers.
Radium was used in the past for luminescent painting of watches and other instruments, was used in toothpaste, cosmetics, etc. These applications are not permitted now because radium is strongly radioactive and dangerous.
Why ordinary silicon diodes do not emit light?
- Silicon is opaque to all light (IR through UV).
- The bandgap of silicon is not high enough to produce visible photons, only IR photons.
Why when you throw a ball it travels in an arc and not in a perfectly straight line?
After the ball has been thrown it begins to slow down, and gravity begins to take effect until the ball loses momentum and it stirkrs the ground and finally comes to a stop.
yes and such miniaturization has been around for a long time now. The degree of miniaturization possible far exceeds a few thousand on something as big as a fingernail.
Is Hydrogen peroxide solution a liquid?
Not only is hydrogen peroxide solution a liquid, the pure, undiluted form of H2O2 is a liquid. Most people will never see pure H2O2 as it is extremely dangerous; even the rocketry industry, where H2O2 is used as rocket fuel, uses dilute solutions of it.
Why cooling curve of crystalline solids have breaks?
Cooling curve of Crystalline solids have breaks, which corresponds to the begining and ends of the crystallisation process. The temperature remains constant during crystallization as the process is accompained by some liberation of energy, which compensates for the loss of heat and causes the temperature to remain constant.
-Damodar
What are the three kinds of garbage?
The three main categories of garbage are organic waste (biodegradable materials like food scraps), recyclable waste (materials like paper, glass, and plastic that can be processed and re-used), and non-recyclable waste (items that cannot be recycled or composted and must be disposed of in landfills).
Explain the working and constructions of bragg's spectrometer?
Constructin:
It works like an optical spectometer.X-rays frm an Xray tube are incedent on a crystal at some glancing angle 'b'.Since they r to be incedented in form of narrow beams slits of lead plates are used.the crystal is mounted on a turntabe which can move along a vertical axis.circular scales are mounted on the turntable to measure the ange'b'.At some point it consists of an arm which has a detector attached to it.when the turntablle moves with an ange'b' the arm moves with angle 2b.this way the X-ray beam is always incidented inside the detector.The ionising current produced by the reflected beam is merasured by a sensitive electometer E or recorded on photographic plates.
Working:
Initially the angle b is adjusted to 0 deg.With this the detector is so adjusted to receive the beam inside it.Then the crystal is moved in small angles and the correspnding deflections is noted down.A graph is ploted of Ionization current vs glancing ange.
This is used to verify Bragg's law.
ie sin a:sin b:sin c=1:2:3.
Which is the most malleable metal at room temperature?
Gold is the most malleable metal at room temperature. It is easily beaten and shaped into thin sheets without breaking.
What is the mass if proton if it is travelling at 99.9 percent of the speed of light?
The concept of 'relativistic mass' was disliked by Einstein, the father of special relativity. However a value can be obtained using;
M = m/(1-v2/c2)1/2
Where M is the relativistic mass, m is the rest mass, c is the speed of light in a vacuum and v is the velocity.
With v/c = 0.999 we obtain
M = m*22.37
With m as the proton mass, m=1.673*10-27 Kg
M = 3.74*10-26 Kg
Why did Dewar low temperature research end?
Dewar's research pretty much ended with the outbreak of World War I. The Royal Institution laboratories where Dewar was working lost a number of staff to the war effort, both in fighting and scientific roles, and after the war, Dewar had little interest in restarting the serious research work which went on before the War. Shortages of scholars necessarily compounded the problems. His research during and after the war mainly involved investigating surface tension in soap bubbles, rather than further work into the properties of matter at low temperatures.
What is the time when you are given velocity and distance?
Velocity is in distance/time, so multiplied by 1/distance would give you 1/time.
Hope this helps!
