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EM Waves
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Created by
Samradhi Agrawal
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Cards (13)
Radio
wave:
W.L.- >
0.1m
Freq-
3 * 10^3 to 3* 10^8
Micro
wave:
W.L.
- 0.1 m to 1mm
Freq-
3*10^8 to 3 *10^11
Infrared
wave:
W.L.-
1mm to 700nm
Freq-
3 * 10^11 to 4 * 10^14
Light
:
W.L.-
700nm to 400nm
Freq-
4*10^14 to 8 * 10^14
ultraviolet
:
W.L.-
400nm to 1nm
Freq-
8*10^14 to 8 *10^16
X-rays
:
W.L.-
1nm to 10^-3nm
Freq-
1* 10^16 to 3 * 10^21
Y-rays
:
W.L.-
<10^-3nm
Freq-
5* 10^18 TO 5 * 10^22
Y-rays
:
use-
penetrate
thick iron; due to
high energy
used in
nuclear reactions
; destroy
cancer cells
production-
Radioactive decay
of nucleus
Detection-
Photographic film
&
ionisation chamber
X-rays
:
Use-
Medical diagnosis
like
fracture
,
TB in lungs
,
stone in gallbladder and kidney
; to
check flaws in bridges
; to study
crystal structure
production-
X-ray
tubes; inner shell
electron
detection-
Photographic
films &
geiger
tubes
Ultraviolet
rays:
uses-
vitamin D
;
sterilization
; detect invisible writing, forged documents,
finger
prints
in forensic labs;
preserve
food
production- inner shell electrons in atoms moving from one energy level to lower energy level
detection- photocell;
photographic film
Infrared
:
uses-
long distance photography
;
therapeutic
purpose;
green house effect
production- by
hot bodies
and
molecules
vibration
detection-
Thermopile
;
bolometer' infrared photographic film
Microwaves
:
use-
RADAR system
for
aircrafts
;
homes
as
microwaves
production-Special
vacuum tubes
like
klystrons
,
magnetrons
&
gun diodes
detection-
point contact diodes
Radio
waves:
uses-
broadcasting
programs to
distant
places
production-
rapid
acceleration
and
de-acceleration
of electrons in
aerials.
detection-
receiver's
aerials