6. What happens when UV light shines on a fluroscent lamp
disinfective water
uses UV radiation to emit visible light. They're safe to use as all the UV radiation is absorbed by a phosphor coating on the inside of the glass
mark your property with your name - Security pens
7. How are we able to see the stars? How are we able to see planets?
The naked eye. And also through telescopes.
we aren't.
8. Give 3 ways to protect yourself from UV rays.
Protective clothing, Hats and sunscreen.
Sun glasses.
clothes.Li
9. Give an example of a transverse wave.
Ultrasound.
An example of a transwerse wave would be Light and all other EM waves.
Sound
10. Do galaxies further away have more or less red-shift than those nearer?
Galaxies further away have more red shift
Galaxies further away have less red shift
11. How did herschel discover infrared radiation?
Herschel discovered IR by measuring the tempreature past the red region that you couldn't see and found out that it was hotter than red.
Used photographic paper, prism, and sunlight to setup an experiment.
12. Explain why some people are worried about the effects of using a mobile phone.
Radiation exposion
I don't know.
13. What's the main theory fot the origin of the Universe?
The Big Bang theory
The Steady State Theory
14. Explain how Galileo's observations of jupiter proved the geocentric model wrong?
The geocentric model is the accepted model.
It showed that Jupiter had 4 moons orbiting it so clearly not everything was orbiting the Earth
It didn't.
15. List 5 uses of infrared radiation around the home.
Cooking, Remote controls, Mobile phones, Security systems, computers.
Security Pens.
Fluorescnet lamps
16. Describe the main features of the Geocentric Model
Nicolous Copernicus
Ptolomy, Earth was in the centre, and everything orbitied the earth including the sun and all of the other planets. The earth was stationary. Moon, Sun, Planets and stars moved around the earth in circular orbits.
Sun was in the centre. Planets moved around the sun in a circular motion.
17. Give an example of a longitudinal wave.
Sound and ultrasound
Light
All other EM waves.
18. What are the final two stages of a Big stars life?
White dwarf
SuperNova, Neutron star OR Black hole
Plantary nebula
19. List the 7 types of electromagnetic radiation in order of increasing wavelengths.
Gamma Rays, X Rays, Ultraviolet, Visible Light, Infrared, Microwaves, Radio Waves.
