mistakes and improvements needed in my end of year exam

• Need to know how to calculate acceleration.
• Be able to state a factor which increases thinking distance
• Need to revise circuits, like adding a voltmeter to measure potential difference across a component.
• The complete law of reflection
• Showing reflection accurately
• Showing how the size of a gap in a barrier affects the effect of diffraction. (drawing)
• Showing the accurate path of a beam of light through water then air
• Definition of critical angle.
• Calculating critical angle
• Showing how information is transmitted through an optical fibre ACCURATELY
i need to remember unit one formula

Objective 3.13

3.13
recall that the detrimental effects of excessive exposure of the human body to electromagnetic waves, including:
* microwaves: internal heaating of body tissue
* infrared: skin burns
* ultraviolet: damage to surface cells and blindness
* gamma rays: cancer, mutation

Objective 3.12

3.12
recall some of the uses of electromagnetic radiations, including:
* radio waves:broadcasting and communications
* microwaves: cooking and satellite transmissions
* infrared: heaters and night vision equipment
* visible light: optical fibres and photography
* ultraviolet: fluorescent lamps
* x-rays:observing the internal structure of objects and materials and medical applications
* gamma rays: sterilising food and medical equipment