easy-watermark domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/u223937191/domains/scienceworksheets.co.uk/public_html/wp-includes/functions.php on line 6170Practice Question
1.Describe evidence that shows it is the wave which moves when ripples are seen on the surface of water.Â
Ripples spread outward, but the water itself does not move away from the source.
If an object such as a cork is in the water and bobbing up and down, ripples move outwards, but the object bobbing up and down does not move with the wave
2.Describe evidence that shows it is the wave which moves when sound waves travel through the air
When someone speaks, sound waves travel through the air to the listener, but the air itself does not move from the speaker to the listener.
If air moved with the wave, wind would be created every time a sound is produced.
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans