1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tom [10]
3 years ago
6

The laser pointer emits light because electrons in the material are excited (by a battery) from their ground state to an upper e

xcited state. When the electrons return to the ground state, they lose the excess energy in the form of 520-nm photons. What is the energy gap between the ground state and excited state in the laser material
Physics
1 answer:
ololo11 [35]3 years ago
8 0

Answer:

Explanation:

the energy gap between the ground state and excited state in the laser material will be equal to energy of photons emitted

Wave length of photons = 520 nm

Energy = 1244 / 520 e V ( Formula for conversion of wavelength in nm to energy in eV )

=   2.4  e V

 the energy gap between the ground state and excited state in the laser material  =   2.4  e V

You might be interested in
What statement is true? (more than 1 answer)
Lisa [10]
Thes are all correct :<span>2.Scientists observe natural events occurring around them. They question these observations and investigate them.

3.All scientists follow one scientific method of investigation

4.If a hypothesis is not verified by the results from the scientific method, scientists may either redo the process or create a new hypothesis.</span>
7 0
3 years ago
Need help ASAP!!!! here are the options: Amplitude, Compression, Rarefaction, and Wavelength
Strike441 [17]
Amplitude is the pair of vertical buttons, so to speak. Compressions are the bunched up vertical lines with the purple arrows pointing left and right. Rarefactions are purple arrows pointing down. Wavelength is crest to crest purple buttons. Associated LH and RH pointing arrows.
6 0
3 years ago
A celebrated Mark Twain story has motivated contestants in the Calaveras County Jumping Frog Jubilee, where frog jumps as long a
IrinaK [193]

The frog's launch speed and the time spends in the air are 22.5m/s and 2.73s respectively.

To find the answer, we need to know about the time of flight and range of projectile motion.

<h3>What's the expression of range of a projectile motion?</h3>
  • Range = U²× sin(2θ)/g
  • U= initial velocity, θ= angle of projectile and g= acceleration due to gravity
  • U=√{Range×g/sin(2θ)}
  • Here, range= 2.20m, = 36.5°
  • U= √{2.20×9.8/sin(73)}

U= √{2.20×9.8/sin(73)} = 22.5m/s

<h3>What's the expression of time of flight in projectile motion?</h3>
  • Time of flight= (2×U×sinθ)/g
  • So, T= (2×22.5×sin36.5°)/9.8

= 2.73 s

Thus, we can conclude that the frog's launch speed and the time spends in the air are 22.5m/s and 2.73s respectively.

Learn more about the range and time period of projectile motion here:

brainly.com/question/24136952

#SPJ1

4 0
2 years ago
Andy is waiting at the signal. As soon as the light turns green, he accelerates his car at a uniform rate of 8.00 meters/second2
lbvjy [14]
-- The car starts from rest, and goes 8 m/s faster every second.

-- After 30 seconds, it's going (30 x 8) = 240 m/s.

-- Its average speed during that 30 sec is  (1/2) (0 + 240) = 120 m/s

-- Distance covered in 30 sec at an average speed of 120 m/s 

                                                                           = <span> 3,600 meters .</span>
___________________________________

The formula that has all of this in it is the formula for 
distance covered when accelerating from rest:

       Distance = (1/2) · (acceleration) · (time)²

                       = (1/2) ·      (8 m/s²)     · (30 sec)²

                       =      (4 m/s²)          ·      (900 sec²)

                       =            3600 meters.

_________________________________

When you translate these numbers into units for which
we have an intuitive feeling, you find that this problem is 
quite bogus, but entertaining nonetheless.

When the light turns green, Andy mashes the pedal to the metal
and covers almost 2.25 miles in 30 seconds. 

How does he do that ?

By accelerating at 8 m/s².  That's about 0.82 G  !

He does zero to 60 mph in 3.4 seconds, and at the end
of the 30 seconds, he's moving at 534 mph !  

He doesn't need to worry about getting a speeding ticket.
Police cars and helicopters can't go that fast, and his local
police department doesn't have a jet fighter plane to chase
cars with. 
5 0
3 years ago
What is the effect on the force of gravity between two objects if the mass of one object doubles?
Leni [432]
Then the force will also be doubled
6 0
3 years ago
Other questions:
  • You have a 160-Ω resistor and a 0.430-H inductor. Suppose you take the resistor and inductor and make a series circuit with a vo
    10·1 answer
  • What do astronomers call a system that is composed of more than two stars
    15·1 answer
  • Suppose that you release a small ball from rest at a depth of 0.730 m below the surface in a pool of water. If the density of th
    11·1 answer
  • Which property of metals allows aluminum to be flattened into thin sheets of aluminum foil? shininess malleability brittleness h
    15·2 answers
  • What is the name given to the semiconductor device that has three or more elements?
    5·1 answer
  • If the third charge (–| q 3 |) is placed at point P, but not held fixed, it will experience a force and accelerate away from the
    14·1 answer
  • A thin disk of mass 2.2 kg and radius 61.2 cm is suspended by a horizonal axis perpendicular to the disk through its rim. The di
    15·1 answer
  • Please help with this question​
    9·2 answers
  • A 3.50-g bullet has a muzzle velocity of 250 m/s when fired by a rifle with a weight of 25.0 N. (a) Determine the recoil speed o
    12·1 answer
  • What happens to the angle of reflection with respect to the angles of incidence?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!