Because the speed of both kinds of light is the same, a lower frequency wave has a longer wavelength. This why it takes 8 minutes for the suns light to reach earth even though the sun is 93 million miles away. But through the vast distance of outer space, even light can seem slow. You can use a calculator but you must show all of the steps involved in doing the problem. The beams refract towards each other until they meet at a point look at light look at light 6 a find the circular block and place it in the path of the three beams of light. A bullet or moon or planet always has a speed that is relative to something else. Speed of light depends on media medium speed ms refractive index vacuum 3 x 108 air 2. Look at the picture of the pencil in the glass of water. First, convert nanometersnm into meters by multiplying by 109 6. Have some fun exploring the speed of light with this stellar space science worksheet. Unfortunately, only radio waves and other forms of electromagnetic radiation can travel exactly this fast. If a car travels 400m in 20 seconds how fast is it going. The hotspots should occur at half the wavelength of microwaves.
The speed of light is related to frequency f and wavelength o by the formula to the right. Mastering concepts how does the angle of incidence compare with the angle of refraction when a light ray passes from air into glass at a nonzero angle. What was the distance between the astronomers and the moon. The city school reinforcement worksheet eoy 2015 science class 7 light page 2 of 8 5. You can calculate the speed of a wave if you know its. Students will be able to identify the crest, trough, amplitude, and wavelength of.
What is the variable that we use to represent wavelength m w. For many years, the posted highway speed limit was 88. One of these differences involves the ability to travel in a vacuum. Calculate the period of the green light waves in the above. Calculate the frequency of green light waves with this wavelength. What is the result of light hitting an objectinteracting with matter.
To get the same effect, shine a light through a prism, a medium that breaks up light. This video response worksheet and key is based on the bbc documentary series andrew marrs history of the world episode 4. If you move 50 meters in 10 seconds, what is your speed. In this activity, students measure the speed of light using a microwave oven and the wave speed equation. Calculate the angle of refraction for light as it passes from air to each of. The time that has passed between when light was originally emitted by a source and when we detect it on earth is known as the. Calculate the speed of light in a hypothetical material you have discovered and named in honour of yourself. Calculate the frequency of light that has a wavelength of 4. Silicon worksheet answer key 1 measuring refraction. At dusk, you often can only make out the shape of objects, not their color. The frequency of red light is lower than the frequency of blue light. It is such an important quantity in physics that it has its own. The problem with this is that light is so fast it travels between points on earth seemingly instantaneously.
This lesson can be used as a lab or demonstration to teach students about the speed of light and it relationship to frequency and wavelength. If an angle between the incident ray and reflected ray is 90o, then the angle of reflection. Physics worksheet reflection and refraction section. Students will understand properties and behavior of heat, light, and sound. The different colors of light that we see correspond to different frequencies. Prepared by teachers of the best cbse schools in india. Light waves can interfere with other light waves, canceling or amplifying them. Light reflection and refraction chapter10 w e see a variety of objects in the world around us. The moons of jupiter evening read chapter 2, observing jupiter and galilean moons. Displaying all worksheets related to speed of light.
B people are tired and they can not see colors as well. Figure 4 shows how the wavelengths of trans verse and compressional waves are. Light travels through a vacuum at a speed of 3 x 108 ms. Curriculum guide for light energy wallingford schools.
In this worksheet students will use a visible light spectrum chart to calculate the wavelength of different colors of light. Speed of light and all electromagnetic spectrum waves c 3. In this travel time of light worksheet, students read about the nasa satellites and space probes that transmit radio signals at the speed of light across huge distances. Light from the sun takes about 8 minutes to go 93 million miles 149 million kilometers to earth. This would be the distance that light can travel in a year, or 5,865,696,000,000 miles. The light rays bend as the light rays pass from the water to the air, making the pencil look bent. Click on popout icon or print icon to worksheet to print or download. What 2 criteria are needed for total internal reflection to occur. A wave has a frequency of 900 hz and a wavelength of 200 m. Microwaves are set at a frequency to make water molecules vibrate and hence heat the food. Calculate the energy and frequency of red light having a wavelength of 6. The fastest speed in the universe, the speed of light. Sketch the light beam as it enters and passes through the block.
The worksheets are useful for ks3 students, especially year 8 students to revise and master the topic. May 28, 2015 wave speed worksheet conceptual questions 1. Sample problem a buoy bobs up and down in the ocean. However, we are unable to see anything in a dark room. Calculate the wavelength of radiation with a frequency of 8. Properties of light university of maryland college of. Pitch is determined by the vibration rate of the sound source. Speed of light worksheet dcjsss lesson plan template and teaching resources. The nature of light as a wave a small disturbance in an electric field creates a small magnetic field, which in turn creates a small electric field, and so on light propagates itself by its bootstraps. Does time dilation mean that time actually passes more slowly in moving references frames or that it only seems to pass more slowly. This would be the distance that light can travel in a. Determine the speed of light in the following materials. What is the wavelength of light with a frequency of 7. This equation allows the calculation of the energy of photons, given their frequency.
If an angle between the incident ray and reflected ray is 90o, then the angle of reflection is a 450 b 00 c 900 d 30o q2. A helium laser emits light with a wavelength of 633 nm. You can calculate the speed of a wave if you know its wavelength and frequency using the equation below. A wave has a wavelength of 125 meters is moving at a speed of 20 ms. Speed of light math problems, blackbody worksheet, color analyzer activity. Students will be able to identify the crest, trough, amplitude, and wavelength of a wave. Light lesson 1 worksheet 4 this worksheet focuses on the speed of light. Really long distances can be measured in light years. Second, light always travels through the shortest path possible. What is the variable that we use to represent frequency hz. Speed of light worksheet dcjsss teaching resources. Worksheets keplers laws of planetary motion, new tons laws, the galilean moons of jupiter afternoon. Mar 17, 2017 speed of sound can be calculated fairly accurately from videos.
Then using the light equation and speed of light the students will figure out the frequency for each color. Light lesson 1 worksheet 4 this worksheet focuses on the speed of light and working out the time taken for light to reach earth from the sun and the distance to pluto. Light travels at about 186,000 miles per second 300,000 kilometers per second. In a microwave, a number of waves are generated by the magnetron. A red laser pointer emits light with a wavelength of 700nm. You will receive a zip file which contains a video response worksheet in both pdf and editable docx formats and a video response worksheet key in both pdf. The faster waves travel, the more crests or compressions pass by you each second. The first real calculations of light speed came from the shadows of jupiters moons. Almost nothing in this universe can travel faster than light. Measuring the speed of light with chocolate uga extension.
Worksheets are misp speed of light and sound work 3, light waves name chem work 5 1, properties of light, light energy work, name key period speed frequency wavelength, measuring refraction silicon work answer key, physics work lesson 23 sound and light, plancks equation name chem work 5 2. In the next step, students will use the frequency and plancks cons. The first attempts to measure the speed of light were the same way the speed of any other object is measured, distance traveled over time. This worksheet focuses on the speed of light and working out the time taken for light to reach earth from the sun and the distance to pluto. Students solve 3 problems about data transmission from space to. What is the variable that we use to represent speed of light ms c note. The nature of light uw madison astronomy department. What would a sound wave with a large amplitude and large frequency sound like. Modeling concepts to teach dualnature of light speed of light light travels at the very fast speed at 3. Calculate the refractive index for a substance if the speed of light in that medium is a. Cbse class 10 physics light reflection and refraction worksheet. Inspiring worksheets speed of light worksheet images.
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