Welcome to your Light Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. An annular eclipse of the sun is seen by an observer at a point beyond the vertex of the umbra cone of the moon in the umbra produced by the earth in the umbra produced by the moon in the penumbra produced by the moon2. Which section of the electromagnetic spectrum is emitted as thermal radiation? Visible light Infra-red Gamma ray Ultra-violet3. The direction of the path taken by light is called beam ray locus line4. A specific electromagnetic wave has a frequency greater than visible light. The wavelength of this wave is longer than that of X-rays. This electromagnetic wave is… an ultraviolet wave a gamma wav a microwave an infrared wave5. Total eclipse of the sun occurs when ozone layer is threatened moon is between the sun and the earth earth is between the moon and the sun sun is between the moon and the earth6. In a normal eye, light rays converge on the: Iris Pupil Lens Retina7. Concave lenses are thinner in the middle and thicker at the edges so they cause light rays to _______ Diverge Converge None of the above Transverge8. This types of mirror has a surface that curves inward: Opaque Mirror Longitudinal Mirror Convex Mirror Concave Mirror9. The distance from the dotted line to Point A, or the distance from the dotted line to Point D is known as the ______________. Amplitude Period Frequency Wavelength10. What is the wavelength of a 92.9 MHz radio wave? 32 cm 32 mm 3.2 m 32 m11. Lenses are used in spectacles to treat some vision defects. The two main lens types are converging lenses and diverging lenses. Diverging lenses always produce virtual, diminished images.Which row of the table describes the images produced by a converging lens? Type of imageSize of image AOnly realOnly magnified BEither real or virtualEither magnified or diminished CEither real or virtualOnly magnified DOnly virtualOnly diminished D C B A12. An image in which no light rays can pass through it is called: Pigment Opaque Transparent Translucent13. The electromagnetic waves that are sensitive to temperature changes are infra red rays X-rays ultra violet rays gamma rays14. A major property of light wave is that it is Electromagnetic in nature Electrostatic in nature In the form of longitudinal waves Propagated in a curved line15. All waves except __________ waves must travel through a medium. Water Compressional Sound Light16. The wave speed equation is v = frequency x wavelength.If the velocity of the wave is 400 m/s and the wavelength is 2m, what is its frequency? 800 Hz 200 Hz 20 Hz 400 Hz17. Which of the following are properties of a plane mirror image?A. The image is the same size as the object.B. The image is upright.C. The image is laterally inverted. A and B A, B and C B and C A only18. Points B, E, G, and J on the wave are _______________. troughs pitch crest nodes19. Which of the following waves can propagate through a vacuum? ultrasonic waves infra red waves acoustic waves high velocity sound waves20. Which of the following is different from others Xrays infra red rays cathode rays gamma rays21. Shadows and eclipses result from the rectilinear propagation of light refraction of light reflection of light diffraction of light22. Which of the following waves cannot travel through a vacuum? sound waves infra red waves radio waves light waves23. If the distance from a light source to a screen is doubled, the illumination on the screen will ben one quarter as much the same twice as much half as much24. What frequency are 20 mm microwaves? 15 GHz 400 MHz 73 GHz 100 MHz25. An endoscope uses glass fibres to enable doctors to see inside a person. Rays of light travel along the glass fibres by total internal diffraction total internal refraction total internal correction total internal reflection26 out of 25Time is Up!