Everything Science Grade 12
CHAPTER 15. EM RADIATION 15.3 The particle nature of light can be demonstrated by the interaction of photons with matter. One wa ...
15.4 CHAPTER 15. EM RADIATION 15.4 Electromagnetic spectrum ESCGT Figure 15.1: The electromagnetic spectrum asa function of freq ...
CHAPTER 15. EM RADIATION 15.4 Exercise 15 - 2 List one source of electromagnetic waves. Hint: consider the spectrum diagram and ...
15.4 CHAPTER 15. EM RADIATION Example 1: EM spectrum I QUESTION Calculate the frequencyof red light with a wavelength of 4 , 2 × ...
CHAPTER 15. EM RADIATION 15.4 c = fλ 3 × 108 = f× 200 × 10 −^9 f = 1. 5 × 1015 Hz Examples of some usesof electromagnetic waves ...
15.5 CHAPTER 15. EM RADIATION 15.5 The particle natureof electromagnetic radiation ESCGU When we talk of electromagnetic radiati ...
CHAPTER 15. EM RADIATION 15.5 Example 4: Calculating the energyof a photon II QUESTION What is the energy of anultraviolet photo ...
15.6 CHAPTER 15. EM RADIATION 15.6 Penetrating abilityof electromagnetic radiation ESCGV Different kinds of electromagnetic radi ...
CHAPTER 15. EM RADIATION 15.6 Ultraviolet radiation andthe eyes ESCGX High intensities of UVB light are hazardousto the eyes, an ...
15.6 CHAPTER 15. EM RADIATION Gamma-rays are not stopped by the skin and can induce DNA alterationby interfering with the geneti ...
CHAPTER 15. EM RADIATION 15.6 Chapter 15 — Summary See the summary presentation ( Presentation: VPpxh at http://www.everythingsc ...
Optical Phenomena and Properties of Matter 16 16.1 Introduction ESCHA For centuries physicistsargued about whether light was a p ...
CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.2 For the electron to receive energy, it absorbs a photon and gets its en ...
16.2 CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER Alternatively, if it is a sunny day, you can useyour teachers’ cars for ...
CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.2 Why is the sky blue? ESCHE The sun emits light at many different wavele ...
16.3 CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER Explain why the skyis blue. More practice video solutions or help at ...
CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.3 Increasing the intensityof the light (i.e. makingit brighter) did not c ...
16.3 CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER If the photon energy is greater than or equal to the work function (en ...
CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER 16.3 UV radiation wavelength = 250 nm = 250 × 10 −^9 m Planck’s constant: h ...
16.3 CHAPTER 16. OPTICAL PHENOMENA; PROPERTIES OF MATTER Step 3 : Is the energy of the photons greater or smaller than the work ...
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