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/* level 1 */
Question("A ray of light travels in a");
WrongChoice("circle.");
CorrectChoice("straight-line.");
WrongChoice("right-angle.");
WrongChoice("none of the above.");

Question("Visible electromagnetic radiation is called");
CorrectChoice("light.");
WrongChoice("a ray.");
WrongChoice("a Light Emitting Diode.");
WrongChoice("none of the above.");

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Question("The rate at which light falls on a surface is called");
CorrectChoice("luminance.");
WrongChoice("luminous flux.");
WrongChoice("capacitance.");
WrongChoice("none of the above.");

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Question("A ray diagram is used to study")
WrongChoice("ray observation.");
CorrectChoice("ray optics.");
WrongChoice("light trend (LTO).");
WrongChoice("diagramming rays.");
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Question("The speed of light in a special type of a precious gem is 1.5&times;10<sup>8</sup>m/s. What is this gem's index of refraction?");
WrongChoice("0.5");
WrongChoice("1.5");
CorrectChoice("2");
WrongChoice("2.5");


Question("A ray of light hits a plane mirror 35&deg; from the normal. What is the angle of reflection?");
CorrectChoice("35&deg;");
WrongChoice("45&deg;");
WrongChoice("55&deg;");
WrongChoice("90&deg;");

Question("The bending of light as it travels from one medium to another is called");
WrongChoice("reflection.");
CorrectChoice("refraction.");
WrongChoice("inspection.");
WrongChoice("none of the above.");

/* level 2 */
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Question("What range of electromagnetic radiation frequencies includes X-rays?");
WrongChoice("10<sup>-14</sup> through 10<sup>-8</sup> Hz");
WrongChoice("10<sup>4</sup> through 10<sup>10</sup> Hz");
WrongChoice("10<sup>16</sup> through 10<sup>20</sup> Hz");
CorrectChoice("10<sup>18</sup> through 10<sup>22</sup> Hz");
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Question("Which type of electromagnetic radiation has the highest frequencies?");
WrongChoice("Light");
CorrectChoice("X-ray");
WrongChoice("Ultra-violet");
WrongChoice("Infra-red");

Question("The relationship between illumination and distance is");
WrongChoice("inverse.");
CorrectChoice("inverse squared.");
WrongChoice("direct.");
WrongChoice("none of the above.");

Question("What is the approximate speed of light?");
WrongChoice("300 m/s");
WrongChoice("3,000 km/s");
CorrectChoice("300,000 km/s");
WrongChoice("3,000,000 km/s");

Question("Plastic has an index of refraction of 1.46. If a ray of light hits a sheet of plastic at an angle of 27.3&deg;, what will the angle of refraction be?");
CorrectChoice("18.3&deg;");
WrongChoice("21.9&deg;");
WrongChoice("34.5&deg;");
WrongChoice("None of the above");

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<h1>Quiz 13. Light</h1>

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