Question: A light-emitting diode (LED) connected to a (3.0 mathrm{~V}) power supplyemits (440 mathrm{~nm}) blue light. The current in the LED is (10 mathrm{~mA}), and the

A light-emitting diode (LED) connected to a $3.0 \mathrm{~V}$ power supplyemits $440 \mathrm{~nm}$ blue light. The current in the LED is $10 \mathrm{~mA}$, and the LED is $60 \%$ efficient at converting electric power input into light power output. How many photons per second does the LED emit?

Step by Step Solution

★★★★★

3.44 Rating (154 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

SOLUTION Okay here are the steps to solve this problem 1 LED voltage 30 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related College Physics Reasoning Questions!

A 75-W light source consumes 75 W of electrical power. Assume all this energy goes into emitted light of wavelength 600nm. (a) Calculate the frequency of the emitted light. (b) How many photons per...

Q1. You have identified a market opportunity for home media players that would cater for older members of the population. Many older people have difficulty in understanding the operating principles...

A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 630 nm is directed onto the photocell, electrons are emitted at the rate of 2.6 x...

A light - emitting diode ( LED ) connected to a 3 . 0 VV power supply emits 4 4 0 nmnm blue light. The current in the LED is 2 1 mAmA , and the LED is 7 1 % % efficient at converting electric power...

A light - emitting diode ( LED ) connected to a 3 . 0 V power supply emits 4 4 0 nm blue light. The current in the LED is 2 1 mA , and the LED is 5 6 % efficient at converting electric power input...

Please answer the following in detail given the lab report and data shown below: 1. Resistance, R, is defined using R = V/I where V is the voltage across a resistor, and I is the current. R is...

1. Using Value Chain analysis, identify three segments in the Value Chain in which the company creates value. Provide an example for each. 2. Using Resource Based View, identify two strategic...

If Wells Fargo installs solar panels on even a small fraction of its more than 6000 banking branches across the United States, it can become one of the largest and most sustainable energy producers...

R "To every madness there is a logic," proclaimed Alexander Tokman, CEO of the Redmond, Washington based high tech company Microvision. It was September, 2009. Tokman had been under a lot of pressure...

A thin triangular plate of mass m is welded along its base AB to a block as shown. Knowing that the plate forms an angle with the y axis, determine by direct integration the mass moment of inertia...

Consider an economy where aggregate output Y is produced using capital K and labour L according to the production function YK"L", where is a parameter with 0

A stalling strategy has succeeded when the victim has to pay for private prosecution.TrueFalse

5. Provide examples that illustrate why an American call on a dividend-paying stock or an American put (irrespective of dividend policy) might be exercised prematurely.

A helium-neon laser emits red light with = 632.8 nm. Find (a) The energy of a single photon and (b) The momentum carried by a single photon.

A heliumneon laser ( = 632.8 nm) emits radiation with a power of 100 mW. How many photons does it emit in 1 s?

X-rays used by your dentist have a wavelength near 0.070 nm. (a) What is the frequency of this radiation? (b) What is the energy of a single X-ray photon with this wavelength?

Study the scenario and complete the questions that follow: Implementing VLSM , VLAN Interconnection, OSPF Configuration Implementing VLSM , VLAN Interconnection, OSPF Configuration, and Connectivity...

You find a stock that just paid a dividend of $1.80 that is expected to grow at 20% per year for the next four years, then at a constant rate of 6%. If you require a return of 9%, what is the most...

Elmer received a $25,000 loan from a loan shark. The loan required him to make payments of $400 per week (52 weeks per year) for three years. What annual rate (APR) and effective annual rate (EAR)...