WorksheetsNaMSE1
Total questions: 10
Worksheet time: 16mins
Name
Class
Date
1.
Steve Jobs introduced the first "smart phone" in 2007. Which sensor was not included?
a)
ambient light sensors.
b)
proximity sensor.
c)
accelerometer sensor.
d)
magnetometer.
2.
Nanoscale catalysts are attractive since
a)
their surface/volume ratio scales with 1/radius ^2.
b)
nanosize could lead to novel chemical properties.
c)
they are less toxic.
d)
their production is cheaper.
3.
The resolution of an electron microscope is
a)
diffraction limited.
b)
limited by elastic interaction with the sample.
c)
limited by interaction volume size.
d)
is limited by the imperfect capacitive lenses.
4.
Electrons kicked out from core orbits
a)
are the main source of secondary detector signal.
b)
create X ray emission, the source of secondary e detection.
c)
result backscattered electrons.
d)
used for composition analysis by EDS detector
5.
Focused ion beam…
a)
is a technique to engineer surfaces at the atomic level.
b)
bombards the surface with ions which allow to mill atoms out.
c)
uses different principle of focusing than electron microscopes.
d)
has no pactical application.
6.
Nanotechnology
a)
is a multidiciplinary field including physics, chemisty and biology.
b)
was overadvertised around 2000, but has no influence on science today.
c)
started with the realization Scanning Electron Microscope.
d)
focuses on objects which are smaller than 1μm.
7.
The resolution of a Fourier transform infrared spectrometer depends on
a)
the maximal path length difference.
b)
the spectral width of the source.
c)
the sampling interval.
d)
the speed of the moving mirror.
8.
X-ray absorption does NOT sensitive to
a)
the composition
b)
the local environment
c)
the charge state
d)
the mass number
9.
The number of vibrational modes in a diatomic molecule is
a)
3
b)
2
c)
1
10.
GaAs is a valuable material for photonics because
a)
it has indirect band gap
b)
it has direct band gap
c)
emits blue light
d)
has large spin-orbit coupling
100 %
