Page 300 - (DK) I Can’t Believe It! 2

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Cool science

SEEING THE LIGHT X-ray technology has
revealed the layers of
paint in Leonardo da
Visible light, from red to violet, is part of the electromagnetic spectrum, Vinci’s Mona Lisa. She
which also includes other types of electromagnetic radiation. It runs once had eyebrows
from long-wavelength radio waves to short-wavelength gamma rays.
but they were painted out.
An incandescent light bulb turns VISIBLE
only three percent of INFRARED LIGHT ULTRAVIOLET (UV)
electrical energy into light.
MICROWAVE X-RAY

RADIO GAMMA

WAVELENGTH 5,000,000,000 10,000 500 250 0.5 0.005 nanometers

ENERGY 0.000000000243 0.124 2.48 4.95 2,460 2,480,000 ELECTRON VOLTS

On a sunny day about one quadrillion photons (light particles) hit an area the size of a pinhead each second.
LIFE SAVERS WHAT’S THAT

Vaccination prevents more than TWO MILLION deaths every year. NOISE?
AT 115 DECIBELS, A BABY’S CRY IS
LOUDER THAN A TYPICAL CAR HORN.
SMALLPOX 100% DIPTHERIA 86% WHOOPING COUGH 64% MEASLES 60% HEPATITIS B 58% TETANUS (IN BABIES) 33% TUBERCULOSIS 6% 0 Decibel level at 3.3 ft (1 m) 192
80
112
40
152

112
80
40
152
192
0
Estimated percentage of lives saved by vaccination per year

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