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
Jet001 [13]
3 years ago
13

A laser emits a beam of light whose photons all have the same frequency. When the beam strikes the surface of a metal, photoelec

trons are ejected from the surface. What happens if the laser emits twice the number of photons per second
Physics
1 answer:
seraphim [82]3 years ago
3 0

Answer:

the no. of ejected electrons per second will increase.

Explanation:

In photoelectric effect, when a light is incident on a metal surface it ejects some electrons from the metal surface. The energy of photon of light must be equal to or greater than the work function of that metal. All the extra energy above the work potential appears as the kinetic energy of the ejected electrons. So, greater he energy of photon greater will be the kinetic energy of the ejected electrons.

A single photon interacts with a single electron and ejects it only if its energy is greater than work function. So, the increase in no. of photons per second means an increase in the intensity of laser beam. And greater no. of photons, will interact with greater no. of electrons. So, <u>the no. of ejected electrons per second will increase.</u>

You might be interested in
Which interaction between x-ray photons and matter results in total absorption of the incident photon?
Leno4ka [110]

Answer:

Photoelectric effect        

Explanation:

In the photoelectric effect, when an x-ray strikes on a metal surface, the energy is completely absorbed by the metal. If the energy would be equal to or more than work function of  metal, electron ejects out. The kinetic energy of the electron which is ejected depends on the energy of the incident radiation and work function of the metal.

4 0
4 years ago
An object is 50 cm from a converging lens with a focal length of 40 cm . A real image is formed on the other side of the lens, 2
Leno4ka [110]

Answer:

d) -4.0

Explanation:

The magnification of a lens is given by

M=-\frac{q}{p}

where

M is the magnification

q is the distance of the image from the lens

p is the distance of the object from the lens

In this problem, we have

p = 50 cm is the distance of the object from the lens

q = 250 cm - 50 cm is the distance of the image from the lens (because the image is 250 cm from the obejct

Also, q is positive since the image is real

So, the magnification is

M=-\frac{200 cm}{50 cm}=-4.0

7 0
3 years ago
Which waves are mechanical waves?
dezoksy [38]
<span>sound waves is an example of mechanical waves</span>
5 0
3 years ago
Read 2 more answers
A 9 m3 container is filled with 300 kg of r-134a at 10°c. what is the specific enthalpy (kj/kg) of the r-134a in the container?
andreev551 [17]
Given the mass of R-134a m = 300kg; Volume of the container V = 9  cu. meter; Temperature of R-134a T = 10 degrees Celsius; 
Formula of specific volume : v = V / m = 9 / 300 = 0.03 cu. m / kg. 
At T = 10 degrees Celsius from saturated R-134a tables, vf = 0.0007930 cu. m /kg; vg = 0.049403 cu. m/kg. We know v = vf + x (vg - vf), so 0.03 = 0.0007930 + x (0.049403 - 0.0007930), which makes x = 0.601.  
Specific enthalpy of R-134a in the container is h = hf + x*hfg = 65.43 + (0.601 * 190.73). Answer is 180.0587 kJ/kg
8 0
3 years ago
Can someone answer this fast please
fredd [130]
I believe it’s 6 like it’s most likely to be the answer but I’m sorry if it’s not
4 0
3 years ago
Read 2 more answers
Other questions:
  • A motorboat heads due east at 16 m/s across a river that flows due south at 9.0 m/s. a.) What is the resultant velocity of the b
    14·1 answer
  • If the distance between two objects is increased,the gravitational attraction between them will.....?
    5·2 answers
  • How is Oil bad for the environment?
    7·2 answers
  • A metal wire of resistance R is cut into eight equal pieces that are then placed together side by side to form a new cable with
    12·1 answer
  • Two children sitting on a see saw such that they can't swing.what is the net torque in this situation ??? Need an appropriate an
    8·2 answers
  • Newton second law of motion relates to force, what, and acceleration
    11·1 answer
  • What kind of energy involves the flow of positive charges?
    13·2 answers
  • Which form of energy is used in a wind-up toy robot?
    6·2 answers
  • HELP ME ASAP PLEASE DUE IN 5 MIN
    10·1 answer
  • Design your own roller coaster
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!