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This module was designed and written with you in mind. It is here to help you with the Week 5 lessons in Quarter 2: Force, Motion, and Energy.
Typology: Exercises
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Department of Education
Z est for P rogress Z eal of P artnership
Name of Learner: ___________________________ Grade & Section: ___________________________ Name of School: ___________________________
What I Need To Know In the previous module for Week 4, you were able to explain the effects of electromagnetic radiation on living things and the environment. This time, you will grasp knowledge about two of the properties of light, REFLECTION and REFRACTION. This module was designed and written with you in mind. It is here to help you with the Week 5 lessons in Quarter 2: Force, Motion, and Energy. The scope of this module is all about plane and curved mirrors which are based on the following: Most Essential Learning Competency: Predict the qualitative characteristics (orientation, type, and magnification) of images formed by plane mirrors and curved mirrors and lenses Curriculum Guide Code: S10FE-llg- 50 Content Standard: The learners demonstrate understanding of the images formed by the different types of mirrors and lenses In this module, you will study the REFLECTION property of light. Note that the next module for Week 6 will share the same MELC with this module which is to predict the qualitative characteristics (orientation, type, and magnification) of images formed by plane mirrors and curved mirrors and lenses as we will tackle refraction. In this module, we focus on mirrors while the next module will focus on lenses. One of the thrusts of this module is to make you aware of the purposes of the different types of mirrors so you can select the right kind that you can use in your daily life. In the previous module, you have learned that visible light is the only electromagnetic wave that can be seen by our eyes. Do you know what will happen as it hits a smooth surface and a rough one? Why is the word “AMBULANCE” in an ambulance car written in a reversed manner? Why are the vehicles and grocery shops using a different type of mirror, not the same with the ones we used in our homes?... You will find the answers to these questions as you continue to read further and do the required activities. Module 5 Light: Plane and Curved Mirrors
What’s New The next activities will require you to move around your house. Make sure to remain focus.
Directions : Prepare a water in a container (preferably a basin) similar to the picture on the left.
Directions : Go in front of a mounted plain mirror. Caution: Be careful not to break the mirror (1 point each).
Picture 1 Picture 1 Picture 2 Picture 3 Picture 2 A. The word AMBULANCE in ambulance cars, which are emergency vehicles, are written in reversed so that the drivers of any vehicles in its front can instantly read the correct word in their rear view mirror since the image formed in mirrors are reversed. Thus they can give way for the ambulance right away. B. The word AMBULANCE in ambulance cars, which are emergency vehicles, are written in reversed because this can make the drivers in front of the ambulance see the word clearly so they can give way immediately.
Directions : Get a clean and dry stainless spoon then return in front of the plain mirror.
experienced in Activity 4. Meanwhile, below is the explanation why you were able to arrive with different characteristics of images formed in concave and convex mirrors. Two Kinds of Spherical Mirrors:
1. The Concave Mirror - It is a curved mirror in which the reflective surface bulges away from the light source. - It is called Converging Mirror because the parallel incident rays converge or meet/intersect at a focal point after reflection. 2. The Convex Mirror - It is a curved mirror in which the reflective surface bulges towards the light source. - It is called Diverging Mirror because the parallel incident rays diverge after reflection. When extending the reflected rays behind the mirror, the rays converge at the focus behind the mirror. Have you noticed that mirrors rarely tell the truth? Do the next activity to find out how. Images Formed by Curved Mirrors In locating the image formed in curved mirror graphically, three important points are considered as shown in the figure a below. Take note that the distance from the Center of Curvature ( C ) to the Focal Point or Focus ( F ), is the same distance from the Focal Point or Focus ( F ) to the Vertex ( V ). Therefore, the distance from C to V is just twice the distance between C to F or F to V. For example, if the distance from C to F is 5cm, then the distance from F to V is also 5cm. Thus, the distance from C to V is 10 cm The ‘Four Principal Rays’ in Curved Mirrors Images formed in a curved mirror can be located and described through ray diagramming. The 1) P – F ray, 2) F – P ray, 3) C – C ray, and 4) the V ray.
Convex Mirror What I Have Learned After locating the image formed in curved mirrors through ray diagramming, let us now describe the image’s qualitative characteristics based from your answers in Activity 5.
Direction: Write the characteristics of the image formed in spherical mirrors on the following table. The first one is done for you (1 point each).
What I Can Do
Directions: The following are situations where mirrors are needed. Depending on its application, identify what kind of mirror is needed: plain mirror, concave mirror, or convex mirror (2 points each).
___8. Which is a correct pairing of object location and its image location in concave mirror? a. At F – At F c. Beyond C – At C b. At C – At C d. At C – Between C and F ___9. Which is a correct pairing of object location and image characteristics according to “LOST” in a concave mirror? a. At F – behind the mirror, upright, enlarge, virtual b. Between C & F – beyond C, inverted, enlarge, real c. At C – At C, inverted, reduce, real d. Beyond C – between C & F, inverted, same size, real ___10. The image in a convex mirror is the same regardless where the object is located. What is the characteristics of its image according to “LOST”? a. Between F & V, upright, reduced, virtual b. Beyond C, inverted, enlarge, real c. At C, inverted, reduced, virtual
Additional Activities
Directions: Using the following materials, construct your very own improvised periscope. CAUTION: Be very careful in handling the cutter (30 points). Materials:
construct an improvised periscope based on the information gathered from different resources. A periscope lets you look around walls, corners or other obstacles. Submarines have periscopes so that people inside can see what is on the surface of the water. A periscope is a useful example of the law of reflection at work. It’s important that your mirrors are placed at a 45° angle, because light always reflects away from a mirror at the same angle that it hits it. In a periscope, light from an object strikes the top mirror at 45° and bounces off at the same angle. This sends light directly down the tube and onto the lower mirror. This mirror, also at a 45° angle, reflects light directly to your eye. Source: https://www.scienceworld.ca/resource/periscopes/
Answer Key - Gr10Q2W Science What I Know
Development Team Mi Ultimo Adios Writer: Kathleen Joy B. Bongcawel Editors: Margie Lou C. Jacob Laarni A. Adonis Kathleen Joy B. Padilla Joly C. Baradero Reviewer: Sandy R. Albarico Illustrator: Layout Artist: Management Team: Majarani M. Jacinto, CESO VI SDS-ZDS Visminda Q. Valde, Ed.D ASDS Raymond M. Salvador, Ed.D ASDS Juliet A. Magallanes, Ed.D CID Chief Florencio R. Caballero, DTE EPS-LRMDS Sandy R. Albarico EPS-Science Deja que el sol, ardiendo, las lluvias evapore Y al cielo tornen puras, con mi clamor en pos; Deja que un ser amigo mi fin temprano llore Y en las serenas tardes cuando por mí alguien ore, ¡Ora también, oh Patria, por mi descanso a Dios! Ora por todos cuantos murieron sin ventura, Por cuantos padecieron tormentos sin igual, Por nuestras pobres madres que gimen su amargura; Por huérfanos y viudas, por presos en tortura Y ora por ti que veas tu redención final. Y cuando en noche oscura se envuelva el cementerio Y solos sólo muertos queden velando allí, No turbes su reposo, no turbes el misterio, Tal vez acordes oigas de cítara o salterio, Soy yo, querida Patria, yo que te canto a ti. Y cuando ya mi tumba de todos olvidada No tenga cruz ni piedra que marquen su lugar, Deja que la are el hombre, la esparza con la azada, Y mis cenizas, antes que vuelvan a la nada, El polvo de tu alfombra que vayan a formar. Entonces nada importa me pongas en olvido. Tu atmósfera, tu espacio, tus valles cruzaré. Vibrante y limpia nota seré para tu oído, Aroma, luz, colores, rumor, canto, gemido, Constante repitiendo la esencia de mi fe. Mi patria idolatrada, dolor de mis dolores, Querida Filipinas, oye el postrer adiós. Ahí te dejo todo, mis padres, mis amores. Voy donde no hay esclavos, verdugos ni opresores, Donde la fe no mata, donde el que reina es Dios. Adiós, padres y hermanos, trozos del alma mía, Amigos de la infancia en el perdido hogar, Dad gracias que descanso del fatigoso día; Adiós, dulce extranjera, mi amiga, mi alegría, Adiós, queridos seres, morir es descansar. Dr. Jose Rizal ¡Adiós, Patria adorada, región del sol querida, Perla del mar de oriente, nuestro perdido Edén! A darte voy alegre la triste mustia vida, Y fuera más brillante, más fresca, más florida, También por ti la diera, la diera por tu bien. En campos de batalla, luchando con delirio, Otros te dan sus vidas sin dudas, sin pesar; El sitio nada importa, ciprés, laurel o lirio, Cadalso o campo abierto, combate o cruel martirio, Lo mismo es si lo piden la patria y el hogar. Yo muero cuando veo que el cielo se colora Y al fin anuncia el día tras lóbrego capuz; si grana necesitas para teñir tu aurora, Vierte la sangre mía, derrámala en buen hora Y dórela un reflejo de su naciente luz. Mis sueños cuando apenas muchacho adolescente, Mis sueños cuando joven ya lleno de vigor, Fueron el verte un día, joya del mar de oriente, Secos los negros ojos, alta la tersa frente, Sin ceño, sin arrugas, sin manchas de rubor Ensueño de mi vida, mi ardiente vivo anhelo, ¡Salud te grita el alma que pronto va a partir! ¡Salud! Ah, que es hermoso caer por darte vuelo, Morir por darte vida, morir bajo tu cielo, Y en tu encantada tierra la eternidad dormir. Si sobre mi sepulcro vieres brotar un día Entre la espesa yerba sencilla, humilde flor, Acércala a tus labios y besa al alma mía, Y sienta yo en mi frente bajo la tumba fría, De tu ternura el soplo, de tu hálito el calor. Deja a la luna verme con luz tranquila y suave, Deja que el alba envíe su resplandor fugaz, Deja gemir al viento con su murmullo grave, Y si desciende y posa sobre mi cruz un ave, Deja que el ave entone su cántico de paz.
