Welcome to your Light Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. An image in which no light rays pass through it is called a Real Image Virtual Image Reflection Refraction 2. Which of the following is different from others gamma rays Xrays cathode rays infra red rays 3. An image in which no light rays pass through it is called a Real Image Reflection Virtual Image Refraction 4. Which does not normally use infra-red radiation? television remote controller intruder alarm sunbed electric grill 5. Which of the following waves can propagate through a vacuum? infra red waves acoustic waves high velocity sound waves ultrasonic waves 6. 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 image Size of image A Only real Only magnified B Either real or virtual Either magnified or diminished C Either real or virtual Only magnified D Only virtual Only diminished C D A B 7. An endoscope uses glass fibres to enable doctors to see inside a person. Rays of light travel along the glass fibres by total internal refraction total internal diffraction total internal reflection total internal correction 8. The distance between A and F is the _____________. Amplitude Wavelength Period Frequency 9. 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 moon in the penumbra produced by the moon in the umbra produced by the earth 10. When waves in phase combine, it is called: Constructive Interference Destructive Combination Destructive Interference Constructive Combination 11. What is the wavelength of light waves if their frequency is 5.0X1014 Hz? 0.6 micro m 6.0 mm 0.60 m 0.06 mm 12. The distance from the dotted line to Point A, or the distance from the dotted line to Point D is known as the ______________. Frequency Wavelength Period Amplitude 13. Points A and F onthe wave are ________ troughs crest nodes pitch 14. In a normal eye, light rays converge on the: Iris Pupil Lens Retina 15. Shadows and eclipses result from the rectilinear propagation of light diffraction of light reflection of light refraction of light 16. The wavelength of signals from a radio transmitter is 1500 m and the frequency is 200kHz. What is the wavelength for a transmitter operating at 1000kHz? 7.5 m 15 m 300 m 7500 m 17. The biggest disadvantage of incandescent lighting is: It's not good for the environment It's not heat efficient It's not white light It's expensive 18. Which of the following waves cannot travel through a vacuum? light waves infra red waves sound waves radio waves 19. In this example of constructive interference, what increases? Frequency Amplitude Wavelength Speed 20. Which of these colours appears in a pure spectrum of visible light? White Brown Yellow Black 21. Total eclipse of the sun occurs when moon is between the sun and the earth earth is between the moon and the sun sun is between the moon and the earth ozone layer is threatened 22. A major property of light wave is that it is Electrostatic in nature Electromagnetic in nature Propagated in a curved line In the form of longitudinal waves 23. this image shows an example of: A broken straw Reflection Penumbra Refraction 24. Concave lenses are thinner in the middle and thicker at the edges so they cause light rays to _______ Transverge Diverge Converge None of the above 25. All electromagnetic waves travel through a vacuum at the same speed. speeds that are inversely proportional to their frequency. speeds that are proportional to their frequency. None of the above. 1 out of 25 Time is Up! Time's up