Question

The rays of the Sun that cause tanning and burning are in the ultraviolet portion of...

The rays of the Sun that cause tanning and burning are in the ultraviolet portion of the electromagnetic spectrum. These rays are categorized by wavelength: So-called UV-A radiation has wavelengths in the range of 320-380 nm, whereas UV-B radiation has wavelengths in the range of 290-320 nm.

Part A

Calculate the frequency of light that has a wavelength of 345 nm .

ν =   s−1  

SubmitMy AnswersGive Up

Part B

Calculate the energy of a mole of 345 − nm photons.

E =   kJ/mol  

SubmitMy AnswersGive Up

Part C

Which are more energetic, photons of UV-A radiation or photons of UV-B radiation?

photons of UV-A radiation
photons of UV-B radiation

SubmitMy AnswersGive Up

Part D

The UV-B radiation from the Sun is considered a greater cause of sunburn in humans than is UV-A radiation. Is this observation consistent with your answer to part (c) ?

yes

no

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The rays of the Sun that cause tanning and burning are in the ultraviolet portion of...
The rays of the Sun that cause tanning and burning are in the ultraviolet portion of the electromagnetic spectrum. These rays are categorized by wavelength: So-called UV-A radiation has wavelengths in the range of 320-380 nm, whereas UV-B radiation has wavelengths in the range of 290-320 nm. Calculate the frequency of light that has a wavelength of 345 nm . Calculate the energy of a mole of 345 − nm photons. Which are more energetic, photons of UV-A radiation or...
Monochromatic electromagnetic radiation with wavelength λ from a distant source passes through a slit. The diffraction...
Monochromatic electromagnetic radiation with wavelength λ from a distant source passes through a slit. The diffraction pattern is observed on a screen 2.50 m from the slit. Part A If the width of the central maximum is 6.00 mm, what is the slit width a if the wavelength is 500 nm (visible light)? a = m SubmitMy AnswersGive Up Incorrect; Try Again; 5 attempts remaining Part B If the width of the central maximum is 6.00 mm, what is the...
± Using Microwave Radiation to Heat Coffee Microwave ovens use microwave radiation to heat food. The...
± Using Microwave Radiation to Heat Coffee Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by the water molecules in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Part A Suppose that the microwave radiation has a wavelength of 11.2 cm . How many photons are required to heat 305 mL of coffee from 25.0 ∘C to 62.0 ∘C? Assume that the coffee has...
Billy is gearing up for summer! He gets his pitcher of ice tea, a good book,...
Billy is gearing up for summer! He gets his pitcher of ice tea, a good book, and sits out on the lounge chair in his yard for a lazy day reading under the sun. Unfortunately,he falls asleep and the UV light (avg wavelength 300nm) bombards his sleeping face, causing a painful erythema(also known as sunburn).Let’s consider the sunburning process for a 1.0cm diameter patch of Krochmal’s face. a. The patch of skin needs to absorb about 5.5x10^15 photons of the...
The work function of a surface determines the minimum ______________ of light which will cause electrons...
The work function of a surface determines the minimum ______________ of light which will cause electrons to be emitted. A: wavelength B: frequency C: intensity Visible light has wavelengths ranging from about 400 nm at the violet/blue end of the spectrum up to about 700 nm at the red end of the spectrum. If two sources emit the same number of photons per second, one near the red end of the spectrum will emit ________________ one near the blue end....
1. A bat uses very high frequencies so: a. He will kill the insects he's hunting...
1. A bat uses very high frequencies so: a. He will kill the insects he's hunting b. We won't hear them c. The sound waves will be small compared to the insects d. The sound waves will be large compared to the insects e. He can tune in to KMET for the weather report 2. Bees see somewhat into the ultraviolet. This is because: a. They use radar b. They can see in the dark c. They evolved with a...
1) Describe an example of each of the following that may be found of your kitchen:...
1) Describe an example of each of the following that may be found of your kitchen: Explain how your choice falls into this category, and if there is a chemical name or symbol for it, provide that as well. Provide a photo of your example with your ID card in it. a) a compound b) a heterogeneous mixture c) an element (symbol) Moving to the Caves… Lechuguilla Caves specifically. Check out this picture of crystals of gypsum left behind in...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT