Q1 :- Calculate the ratio of spontaneous and stimulated emission light of wavelength ( 590 nm ) at room temperature(300Ko ), and show that : 1. The equilibrium populations of levels energy of this transition? 2. At what temperature is the rate stimulated emission is equal to the rate spontaneous emission?

Q: a. If light is incident upon the water (refractive index 1.33) at an angle of 60°, what is the angle...

A: Since we only answer upto one question, we will answer the first question only, please resubmit the ...

Q: 2) A wire carries a steady current I=0.5 A in Figure. The distances are a=0.1 m, b=0.4 m, and c=0.3 ...

A: I= 0.5 A a=0.1 m b=0.4 m c=0.3 m B=0.25 T a. Magnetic force,  b.

Q: A box of mass M=1980 g, filled with sand, is suspended from a 1=1.5 m long rope. The length of the r...

A: Given: The mass of the box is M = 1980 g The mass of the bullet is m = 20 g The initial velocity of ...

Q: PROBLEM 5.14 Arriving on a newly discovered planet, the captain of a spaceship performed the followi...

A: Given, Let the gravitational acceleration is g. Let the tension in string is T.    

Q: A dc motor with its rotor and field coils connected in series has an internalresistance of 2.00 Ω. W...

A: The emf equation of a motor is given by the equation, where V is the voltage, I is the current, R i...

Q: The earth (a conductor) has a net electric charge. The resulting electricfield near the surface has ...

A: Here, we use the formula for electric field due to a sphere on its surface to get the charge.

Q: Consider two stars with mV = 2.2 and mV = −1.5. What is their combined visual magnitude? Is the answ...

A: The apparent magnitude of a star is the measure of brightness of a star as seen from the earth. The ...

Q: From the following statements, identify those that are always true about simple series circuits or a...

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Q: Tunneling can occur for an electron trying to pass through a very thin tunnel diode. Can a baseball ...

A: Quantum tunneling or tunneling is that the quantum physical phenomenon where a wavefunction can prop...

Q: Find the readings of the ammeter and voltmeter in the circuits in Figure 3. The resistance of the vo...

A: Given, Resistance of voltmeter=1200Ω Resistance R1=300Ω Resistance R2=480Ω Voltage at battery=80V

Q: Explain in detail (in words only)  the applications of adiabatic and sudden approximstions in quantu...

A: The adiabatic approximation touch on to those solutions of the Schrödinger equation that includes a ...

Q: Problem-1: Find the magnetic field at the centre of a square loop, which carries a steady current I....

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Q: Show that the mean energy of electron at absolute zero 3Ef/5

A: If we consider free electron model, energy of electron is given by, Solving for k we get, where m ...

Q: When an object of unknown mass is attached to an ideal springwith force constant 120 N/m, it is foun...

A: We use the relation between frequency and angular frequency to get the required.

Q: 2. The Period of a pendulum mainly depends on: A) the mass of the ball B) the angle of the swing C) ...

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question s...

Q: en in air is: 76.7% by mass and 7 n in tabulated form, otherwise yo

A: Given: To find the balance chemical reaction, ratios of carbon to hydrogen and the air or fuel is gi...

Q: The de Broglie wavelength tells us that even particles can exhibit wave-like properties. Why can’t w...

A: de Broglie suggested that even particles can exhibit wave-like properties. A particle having high ve...

Q: 2 kg of gas occupying 0,7 m3 had on original temperature of 15 °C. It was then heated at constant vo...

A: Given

Q: A capacitance is made of two parallel conducting plates as shown in the figure and the distance betw...

A: The capacitance is given by: where d is the separation between the plates  A is the area  A=LWh Put...

Q: A proton is confined to a nucleus whose diameter is 5.5 × 10−15 ?. If this distance is considered to...

A: Given: Δx=5.5 × 10-15

Q: A horizontal pipe has a constriction in it as shown in the figure below, At point 1 the diameter is ...

A: From the Basic Bernoulli's principle we know  And from Continuity equation  Combining these two wi...

Q: Figure below shows electron energy levels in a hydrogen atom. The arrows show four possible transiti...

A: The arrows show a four possible transitions here we have to find from the figure which of the transi...

Q: 2:Consider an ideal gas Is an quantum canonical ensemble. with internal structure a) show that the c...

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Q: An aluminum container whose mass is 205 g contains 300 g of water at 200C. In this container is then...

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Q: Why we cannot use domestic refrigerator for room cooling? Briefly discuss the difference between win...

A: Solution: It is not possible to cool a room by opening the door of the domestic refrigerator in the ...

Q: 2) A wire carries a steady current I-2.5 A in Figure. The distances are a-0.3 m, b-0.7 m, and c=0.6 ...

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Q: 3. conductors are materials that impede the free flow of electrons from atom to atom and molecule to...

A: The behavior of an object that has been charged depends upon whether the thing is formed of a conduc...

Q: 4. The accumulator of an aircraft hydraulic system is pre-loaded to 1,000 psi. If the system normall...

A: The modern hydraulic system operates at 3000 PSI. If the electric pumps are not running, the static ...

Q: Prove mathematically that photons have momentum.

A: In 1909 and 1916, Einstein showed that, if Planck's law regarding blackbody radiation is accepted, t...

Q: The cars A and B travel on a level road in the same direction at a speed of 90 kph and  100 kph resp...

A: Here, we use the kinematic equations to get the required.

Q: An electron is moving as a free particle in the -x,direction with momentum that has magnitude 4.50 *...

A:

Q: i need the answer quickly

A: Given:-              To find the  probability of particle per unit length is otherwise known as prob...

Q: 3b. Please solve this question in detail and step by step. Thanks  Note: V = 96

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Q: please can you do ıt fast

A: Concept used: The wavelength of photon depends on scattering angle of photon.

Q: i need the answer quickly

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Q: Chemical Engineers are actively involved in the production of sunscreens. Given your knowledge in Ch...

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Q: An infinite line of current is on the z axis with current 10 A in the positive z direction. What is ...

A: Given, An infinite line of current 10 A in positive z direction  

Q: Circular Motion with acceleration, Find velocity when the particle reaches 53° if the angular accele...

A: For a body in a circular motion, it has constant speed and hence constant angular velocity.  The rel...

Q: I did not understand, help me

A: Given,  and curve

Q: 5-23. Calculate the Q value of the decay Po→“ Pb+a, given that the measured kinetic 218 84 energy of...

A: Given  

Q: A motorcycle travels along a straight line with a velocity [ v = ( 2t² – 8 ) m/s ], where ( t ) is i...

A: Given:

Q: 30NF 1OUF a40V :20uF :40 uF 1. Equivalent capacitance of the combination, voltages across the indivi...

A: When a circuit has a combination of capacitors connected together then the whole combination can be ...

Q: A rectangular loop of a wire, whose dimensions are a=4.9m and b=2.3m, is placed in a region of unifo...

A: Given: The dimension of rectangle is a=4.9 m and b=2.3 m Uniform magnetic field is B=0.5 T The angle...

Q: A brick is thrown forward on the ground with the speed of 28 m/s. The coefficient of kinetic frictio...

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Q: 5)5

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Q: Three polarized are placed such that, the first and the third are mutually perpendicular to each oth...

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Q: Ambas! Por favor :3

A: Since we only answer up to 1 question, we’ll answer the first question. Please resubmit the question...

Q: The armature moves along parallel rails at a constant speed v, which is ensured by the appropriate e...

A: Given, The armature moves along parallel rails at a constant speed v, which is ensured by the approp...

Q: Problem-3: Find the total force on the square loop due to long horizontal wire. a a b

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Q: Question: Why passenger vehicles are designed as understeer? Please explain in detail (it would be b...

A: Losing control of a car in a corner is dangerous. Ideally, a car should be able to take the corner u...