In Science / Senior High School | 2025-03-29

What I KnowChoose the letter of the best answer. Write the chosen letter on a separate sheet of paper.1. Who proposed that light is composed of particles that are travelling in a straight line?a. Christiaan Huygensb. Louis de Brogliec. Max Planckd. Sir Isaac Newton2. Which is a disturbance that travels through a medium and carries energy from one location to another without transporting matter?a. crestb. photonc. troughd. wave3. What evidence tells that light is made up of particles travelling in a straight line?a. formation of shadows when light hits obstaclesb. inversion of images formed on plane mirrorsc. production of ripples when a penny is dropped to a pond4. What is true of photoelectric effect?a. Electrons from metals can be dislodged by photons from light.b. The sun's light rays travel in waves directly on the electrons of atoms.c. It proves that light is made up of waves that can remove electrons from metals.d. Light energy is composed of several colors with their respective amounts of energy.5. How is the specific quantity of light that can be absorbed by electrons to produce photoelectric effect called?a. particleb. photonc. waved. wavelength6. What term refers to the bouncing off of light waves when they hit an obstacle?a. diffractionb. reflectionc. refractiond. transmission7. What forms when light waves bounce off a mirrored surface?a. imageb. particlec. photond. shadow8. How is the bending of light waves as they pass from one medium to another medium with different refractive indices known?a. diffractionb. reflectionc. refractiond. transmission9. What is true about the angle of the reflected ray, R?a. It is equal to the angle of the incidence ray.b. It is equal to the sum of the angles of incidence and reflected rays.c. It is equal to the angle between the incident ray, I, and the plane of the mirror.d. It is equal to the angle between the reflected ray, R, and the plane of the mirror.10. A student placed a pencil in a glass of water as in the figure at the right. Why did the pencil appear to be broken?a. Light always travels in a straight line.b. Light makes the water evaporate into the air.c. Light reflects the pencil on the water's surface.d. Light bends when it passes through changing medium like air and water.11. What is the speed of light as it propagates throughspace? a.1.0x10 mb. 2.0x10c. 3.0x10d. 4.0x10d. scattering of light rays when they reach a smooth surface12. How are light waves or electromagnetic (EM) spectrum characterized?a. The crests and amplitudes of the waves are vibrating.b. It is composed of light waves with equal amounts of energy.c. The wavelengths and frequencies are the same for all the waves.d. It is composed of alternating magnetic and electric fields that oscillate perpendicular to each other13. Which is true among the following statements about the properties of light waves?a. The frequency is proportional to the energy.b. The frequency is proportional to the amplitude.c. The wavelength is proportional to the frequency.d. The energy of light waves is proportional to the wavelength..14. How does absorption of light waves happen?a. When refracted light rays pass through from less dense to denser mediumb. When images are formed due to bouncing off of light waves from smooth surfacec. When the energy of vibration is translated to neighbouring atoms that results to reemission of lightd. When incident light has the same frequency of vibration as that of the electrons in the object's atoms15. Why do most leaves appear green to our sight?a. All the colours of white light are absorbed by the leaves,b. The colours of the light are scattered by the molecules of the green leaves.c. Most of the colours of incident white light are reflected from the leaves except green.d. The colours of white light are absorbed by the leaves and green waves are reflected.​

Asked by ianmoloboco02