Question

What type of lamps would you use for UV range radiation? Why? and What lamp would you use for Visible range of radiation? Why?

Answer #1

Ultraviolet (UV) is an electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays. So for UV rays, we would use mercury vapour lamps, tanning lamps etc, because these source have higher recombination energy of electrons from higher to lower ground states and hence they have higher energy photons leaving the system, i.e tin the ultraviolet region

For visible light, we can easily use heating elements, as they have the energy to produce photons while exciting back to the ground state while releasing photons in the visble spectrum range

In a circuit with two identical lamps in parallel, if the
current in one lamp is 0.2
amperes.
a) How much is the current in the battery?
b) If the voltage across the battery is 10 V, how much is the
resistance of each
lamp?
c) Calculate the power dissipated by each lamp and the power
provided by the
battery.
d) If we remove one lamp and keep one, how much is the current
passing
through the lamp that you...

The life of a particular type of fluorescent lamp is
exponentially distributed with expectation 1 . 6 years. Let T be
the life of a random fluorescent lamp. Assume that the lifetimes of
different fluorescent lamps are independent.
a) Show that P ( T> 1) = 0 . 535. Find P ( T < 1 . 6). In
a room, 8 fluorescent lamps of the type are installed.Find the
probability that at least 6 of these fluorescent lamps still work...

how can i do this?
The lifetime of a particular type of fluorescent lamp is
exponentially distributed with expectation 1.6 years. Let
T be the life of a random fluorescent lamp. Assume that the
lifetimes of different fluorescent lamps are independent.
a) Show that P (T> 1) = 0.535.
Find P (T <1.6).
In a room, 8 fluorescent lamps of the type are installed. Find
the probability that
at least 6 of these fluorescent lamps still work after one
year....

The lifetime of a particular type of fluorescent lamp is
exponentially distributed with expectation 1.6 years. Let
T be the life of a random fluorescent lamp. Assume that the
lifetimes of different fluorescent lamps are independent.
a) Show that P (T> 1) = 0.535. Find P (T <1.6).
In a room, 8 fluorescent lamps of the type are installed. Find the
probability that at least 6 of these fluorescent lamps will still
work after one year.
In one building, 72...

1.Which methods, UV radiation or chemical agents, seem to be the
best method(s) of sterilization vs. inhibition?
2.What evidence did you use to make that decision? Describe
three new things you learned in this lab and reflect on how you
learned them.
3.Why is it important to have a standardized method for
antimicrobial sensitivity testing?

A) what is the frequecny of electromagnetic radiation that has a
wave length of 610pm?
B) the visible portion of the electromagnetic spectrum covers
the range from appro. 350 to 700nm. Is the electromagnetic
radiation descrided in part A visible to the eye?
C) How far woulf the electromagnetic radiation descrided in part
A travel in 1.0 second?
I would like to know how to solve each of these questions

usually the concentration range chosen for collecting UV-Vis
spectra of compounds in solution is 0.10-0.15M, why is this
concentration range chosen? Explain why a dilute solution of
ethylenediamine is used as solvent.

What happens to most of the UV radiation in our atmosphere?
absorbed by greenhouse gases
absorbed by plants
absorbed by nitrogen
absorbed by ozone

What type of costing system would you use for a clothing
company? Why did you select this costing system?

Why is ionizing radiation dangerous and what type of tissue is
most likely to be seriously affected by it.

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