Reviewer in Science Past Paper PDF

**GROUP 4** I. **EM SPECTRUM** A. How does the EM waves arranged from left to right in term of the wavelength? From left to right, EM waves are arranged by wavelength as longest to shortest. B. How does EM waves arranged from left to right in terms of its frequency? From left to righ...

**GROUP 4** I. **EM SPECTRUM** A. How does the EM waves arranged from left to right in term of the wavelength? From left to right, EM waves are arranged by wavelength as longest to shortest. B. How does EM waves arranged from left to right in terms of its frequency? From left to right, EM waves are arranged by frequency as lowest to highest. C. What EM wave has the highest energy? Lowest energy? Hightest energy is gamma rays Lowest energy is radio waves D. EM waves are considered as Transverse wave because it is traveling perpendicular to its direction of the propagation. E. **TRUE OR FALSE:** EM waves have different speeds when they are traveling in vacuum. False F. What is the speed of the EM Waves? 3 x 10^8^ m/s G. EM waves have two regions Electric Field and Magnetic Field. II. FILL THE TRIANGLE WITH THE FORMULA OF WAVE EQUATION A. Use the wave formula to solve the word problem. What is the frequency of the EM wave with a wavelength of 1.45 x 10^-4^ meters. B. Convert the standard form to scientific notation and vice versa. 1. 12500000000 1.25 x 10^10^ 2. 0.478000 478 x 10^-1^ 3. 63400 6.34 x 10^4^ 4. 4.54 x 10^3^ 4540 5. 2.91 x 10^-5^ 0.0000291 III. **APPLICATION OF EM WAVES** Complete the table. Choose your answer in the box below. IV. **MIRROR AND LENS** A. REFLECTION 1. A light wave collided in a irregular surface what will happen to the reflected ray? Each light will reflect at a different angle 2. If the angle of the incidence is 25^o^ what will be the angle of reflection? 25^o^ 5. How many images will be formed if two mirrors are facing each other. Infinite **NOTE:** 1. Analogy 2. There will be no image formed in mirrors if the object is located at focal point. V. **MAGNETS AND MAGNETISM** 1. Marco broke the magnet into two pieces what do you think will happen to the magnetic force of the magnet? 2. How are you going to set-up the two magnets if you want to have them have an attraction? And repulsion? VI. **PRINCIPLE OF ELECTROMAGNETISM AND ELECTROMAGNETIC INDUCTION** 1. Who was the proponent that stated "when there is a moving charge, it can produce magnetism"? André-Marie Ampère 2. Where can you find the strongest magnetism in an electromagnet? The strongest magnetism is at the poles of the electromagnet.