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Strategic Intervention Material on Science Grade 10
Title: Gotta Catch 'EM All (Electromagnetic Waves)
Prepared by: ANJAYLO B. PASCUA
Teacher I, Ilwas High School

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1. 1. DEPARTMENT OF EDUCATION REGION III DIVISION OF ZAMBALES SUBIC NATIONAL HIGH SCHOOL ANNEX –V ILWAS HIGH SCHOOL S.Y. 2016—2017
2. 2.  compare the relative wavelengths of different forms of electromagnetic waves  Describe an electromagnetic wave.  Show the relationship among the speed of the wave, frequency, and it’s wavelength  Identify the different types of electromagnetic wave  Give the characteristics of the electromagnetic waves as compared with visible lights Hey, brother! Will you please help me and my friends to evolve fast? Sure! But you have to explore first the concept of EM Waves!
3. 3. Accelerating electrons produce electromagnetic waves. These waves are a combination of electric and magnetic fields. A changing magnetic field produces an electric field and a changing electric field produces a magnetic field. Both the electric field and the magnetic field oscillate perpendicular to each other and to the direction of the propagating wave. All electromagnetic waves can travel through a medium but unlike other types of waves, they can also travel in vacuum. They travel in vacuum at a speed of 3x108 m/s and denoted as c, the speed of light. The wave speed, frequency, and wavelength are related by the following equation: V = f Where: v is the wave speed = c = 3 x 108 m/s is the wavelength (in meters) f is the frequency (in Hertz) Here are some notes for you! Good luck in your journey!
4. 4. Help SQUIRTLE to become stronger and achieve Mega Evolution to become BLASTOISE by identifying whether the statements on some staircases is TRUE or FALSE. Electromagnetic waves can also transfer energy in a vacuum. TRUE FALSE Begin here... Wertortle Stage Blastoise Stage A wave is a disturbance that transfers energy. TRUE FALSE The electric field and the magnetic field oscillate parallel to each other TRUE FALSE As wavelength decreases, the frequency of wave also decreases TRUE FALSE Most EM Waves are invisible and undetectable. TRUE FALSE
5. 5. Wave speed can be calculated from the frequency (f) and wavelength ( λ) using the formula: v = λf where : v—wave speed = 3 x 108 m /s λ—wavelength (in meters) f—frequency (in Hz) PICHU requires 10 megavolts to transform fully into RAICHU. Help him transform by solving the two problems below. The first question was already solved as an example. Example: What is the frequency of radio waves with wavelength of 20 m? Given: v = c = 3 x 108 m/s v = c = λf λ = 20 m f = c/λ f = ? = 3 x 108 m/s 20 m f = 1.5 x 107 Hz Help me solve these problems! What is the frequency of light waves with wavelength of 5 x 10-7 m? What is the wavelength of ultraviolet ray if it’s frequency is 4 x 1016 Hz?
6. 6. Analyze the figure below that summarizes the characteristics of different EM waves and help CHARMANDER to evolve by doing the activity on the next page.
7. 7. KEEP THE FIRE BURNING by helping CHARMANDER to arrange the EM waves in correct order in terms of increasing WAVELENGTH and decreasing FREQUENCY. A successful task will make him evolve into CHARIZARD. Be careful Bro! A mistake can put out the fire because it splashes water.
8. 8. Guide Bulbasaur in connecting the vines of the following EM Waves on Column A with their corresponding wavelengths on Column B. 1.X—Ray 2.Gamma Ray 3.Infrared 4.Radio Wave 5.Microwave 6.UV Ray 7.Visible Light A. > 1 x 10-1 m B. 1x 10-3 to 1 x 10-1 m C. 7 x 10-7 to 1x 10-3 m D. 4 x 10-7 to 7 x 10-7 m E. 1 x 10-8 to 4 x 10-7 m F. 1 x 10-11 to 1 x 10-8 m G. < 1 x 10-11 m
9. 9. Radio Wave Infrared Microwave Visible Light Ultraviolet RaySoft X Rays Hard X RaysGamma Ray Assemble correctly a face of a rubics cube provided by your teacher by arranging the different EM waves in terms of increasing frequencies , from left to right, and from top to bottom.
10. 10. Let us have a battle. Fight with my Pocket monsters by playing Fact or Bluff game! FACE YOUR DEFEAT! Earn an extra XP points by dwelling with a Pokemon trainer in a Fact or Bluff Game. You can win over his pocket monsters by answering all the statements correctly. 1. Electromagnetic wave is considered as a longitudinal wave. 2. The longer the wavelength of the wave, the higher it’s frequency. 3. Gamma rays have the highest frequency among all EM waves. 4. The wavelength of UV rays is as small as a water molecule. 5. EM waves do not require a medium to propagate. 85 XP 120 XP 215 XP 347 XP 500 XP
11. 11. Compose a song that will cover the characteristics of an EM wave and its’ different types based on varying frequencies and wavelengths. Complete the ACROSTIC below to summarize the properties and characteristics of EM waves and its’ types. P— O— K— E— M— O— N— Based on your understanding, draw/ paint your own version of EM Spectrum. Showcase your talent in expressing what you had learned by doing one of the tasks below.
12. 12. Electromagnetic waves are transverse waves that can propagate with or without a medium. All EM waves can travel as fast as 3 x 108 m/s in a vacuum. This is the same with the speed of light, c. The longer the wavelength of a wave, the lower its’ frequency; and the shorter the wavelength of a wave, the higher its’ frequency. Electromagnetic Spectrum is a continuum of different EM waves that are arranged based on frequency and wavelength. EM Spectrum consists of radio wave, microwave, infrared, visible light, ultraviolet ray, x-ray, and gamma ray. Physics. Salmorin, L.M. & Florido, A.V., Abiva Publishing House, Inc. 2010.Quezon City. 283-285.
13. 13. Activity 1 FALSE FALSE FALSE TRUE TRUE Activity 2 1. 6 X 1014 Hz 2. 7.5 x 10-9 meters Activity 3 1. Gamma Ray 5. Infrared 2. X-Ray 6. Microwave 3. Ultraviolet Ray 7. Radio Wave 4. Visible Light Activity 4 1. F 2. G 3. C 4. A 5. B 6. E 7. D Assessment 1 1. Radio Wave 2. Microwave 3. Infrared 4. Visible light 5. Ultraviolet Ray 6. X-Ray 7. Gamma Ray Assessment 2 1. BLUFF 2. BLUFF 3. FACT 4. BLUFF 5. FACT Enrichment Activity (Answers may vary) You made it! It calls for a celebration. Congratulations!