# science

3×10^18 photons of a certain light radiation are found to produce 1.5 j of energy. calculate the wavelength of light radiation

1. 👍
2. 👎
3. 👁
1. E=nhc/lamda
>1.5= 3*10^18 * 6.626*10^-34 * 3*10^8/ lamda(wavelength)

Therefore wavelength =3.973*10^-7

1. 👍
2. 👎
2. What the hell is this answer kha se copy mara h yrrr

1. 👍
2. 👎
3. E= nhc/ lambda
1.5= 3×10^18 × 6.626×10^-34 × 3×10^8 / lambda
Lambda= 9×10^26 × 6.626×10^-34
÷ 1.5
Lambda = 39.75×10^-8 = 3975 Å

1. 👍
2. 👎
4. Question

1. 👍
2. 👎
5. Calculate the wavelength & the period of a blue light wit a energy 5 X 10^-19 J

1. 👍
2. 👎
6. E= nhc/ lambda
1.5= 3×10^18 × 6.626×10^-34 × 3×10^8 / lambda
Lambda= 9×10^26 × 6.626×10^-34
÷ 1.5
Lambda = 39.75×10^-8 = 3975 Å

1. 👍
2. 👎

## Similar Questions

1. ### chemistry

A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

2. ### Physics

1. Light bulbs produce useful energy in the form of light and waste energy in the form of heat. What kind of light bulb would you use to incubate eggs? A) high-efficiency light bulbs because they produce more heat B) High

3. ### physical chemistry

2. The retina of a human eye can detect light when radiant energy incident on it is at least 4.0X10-17 J. For light of 600-nm wavelength, how many photons does this correspond to?

4. ### biology

Which of the following is true of the light-dependent reaction but not of the light-independent reactiopn? a. also known as the Calvin cycle b. requires photons to occur c. stores energy for long term use d. produces carbohydrate

1. ### Science

1. Light bulbs produce useful energy in the form of light and waste energy in the form of heat. What kind of light bulb would you use to incubate eggs? A) high-efficiency light bulbs because they produce more heat B) High

2. ### physics

A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per

3. ### physics

Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per

4. ### Chemistry - Photons

Water is exposed to infrared radiation of wavelength 2.5×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.5 g of water by 2.5 K?

1. ### chemistry

how does intensity of radiation affect the kinetic energy of photons during photoelectric effect

2. ### Chemistry- Dr. Bob

Question 1 Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 1014 Hz. A) 704 nm B) 158 nm C) 466 nm D) 633 nm E) 142 nm My answer: D.633 nm Question 2 How many photons are

3. ### CHEMISTRY

4. The human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0 x 10-17 J of energy to trigger a series of impulses that eventually reach the brain. (a) How many photons of red light (700.0

4. ### Nuclear Chemistry

The half- life of a positron is very short. it reacts with an electron, and the masses of both are converted to two gamma-ray photons: (0e+1)+ (0e-1)---> 2γ (the 0 in front of e is the mass # and behind it is the atomic #) (γ