# A 600W mercury lamp emits monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second?

Let's first write down our givens for this problem

Now let's try to establish a few things.

We use the following formula

But we aren't given the frequency; we are give the wavelength.

Knowing this, we can isolate to solve for the frequency

We can use dimensional analysis to figure out the number of photons emitted per second.

By signing up, you agree to our Terms of Service and Privacy Policy

Use the formula (E = \frac{hc}{\lambda}) to find the energy of one photon. Then, apply (P = nE) to determine the number of photons per second, where (P) is power (in watts) and (n) is the number of photons.

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- Why is the theoretical half life of a proton so high compared to half lifes of other subatomic particles?
- Two plastic balls with opposite charges are hung by a string close to each other. How will they interact with each other?
- Why does radioactive decay occur? ?
- How much heavier is an alpha particle than an electron?
- How do I find the number if nucleons in an isotope of calcium?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7