B. Copy the table below and answer on the answer sheet. Classify the following example of EM wave according to its type
Types of EM
Placed Used
Letters
in waves
town
wave
1. Visible
3.
5.
6.
7.
А
B
С
D
E
F
G
H
1
J
K
L
M
N
O
P
Rainbow
Radio tower on rays TV
television Remotes used in infrared
Radio in Taxi
Photograph light
Microwave oven
Heat lamps
Tanning bed also sun lotion block UV
Sunglasses block UV
Nuclear Medicine
X-ray machine (study bones)
Plants give off infrared
Satellite dish
radio Tower
Observatory
Waves grill sign
9.
10.
11.
12
13.
14.
15.
16.​

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass