19.In a single-slit diffraction experiment the slit is exposed to white light. W

Question

19.In a single-slit diffraction experiment the slit is exposed to white light. What colour is the fringe surrounding the central fringe? low index of refraction. A portion of this light is reflected off a medium with a higher index of refraction. The reflected light will experience a phase change of a) red b) yellow c) violet d) green a) o b) 45 c) 90 d 180 Part B: True or False. Ciswer el Fulerionsh queation to indicate owhether the statement is true (T) or false (p) for each question to Answer all questions in this section. [K-10 1· T/ F Radio waves go through more cycles per second than X-rays. T/F In a ripple tank, a decrease in the frequency of the two vibrating sources 2. causes an increase in the number of nodal lines. T/F For a diffraction grating, the angular separation of the maxima is generally 3. small because the slit spacing is so small. T/F Poisson's bright spot is predicted by the wave model of light. 4. 5. T/F As the slits in a double-slit experiment are moved closer together, the fringes move closer together object Astronomers use telescopes with large aperture sizes to view distant because the large size reduces diffraction and increases resolution. 6. TIF 7. T/F Microwave ovens work by radiating the food with waves of select frequencies that interact strongly with water and carbon dioxide molecules. 8. T/F A CD is a good example of a transmission grating. PH4U-The Wave Nature of Light

Explanation / Answer

19)violet (directly proportional to smaller wavelenth)

20)180 deg

T/F

1)false

2)true

3)true

4)true

5)false

6)true

7)true

8)true

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