Check Test 2 - Waves 1
1 Which of the following substances has the highest refractive index.
a Air.
Diamond.
2 Which of the following diagrams correctly identifies the angle of incidence and the angle of refraction for light passing from glass to air.
3 Which of the following completed statements is incorrect?
A ray is....
... always at right angles to the direction of wave propagation.
4 Powdered window glass appears white in sunlight because....
... the refractive index of glass is greater than that of air.
5 Glass has a refractive index of 1.50. The ratio of frequencies as light passes from air to glass is....
... 1.0
6 A plot of angle i versus angle r for glass in air is ...
... a curve.
7 When light waves pass from air to glass with refractive index 1.5 they....
.... and ... are continuous at the boundary... .... the frequency ratio is fixed. ... are continuous at the boundary... ... the ratio of speeds is 1.0. ... increase in speed... ... decrease in wavelength ... increase in speed... ... increase in wavelength.
8 Light is incident normally on a polished diamond surface (refractive index 2.42). The angle of refraction in the diamond is....
... zero°
9 The diagram shows a ray passing from air to water, to glass, and finally emerging into the air.
Angles 'a' and 'b' are marked. (The diagram may not be accurately drawn.) Which statement is correct?
c Angle a is equal to angle b.
10 A wave diagram is shown.
The diagram best represents ...
... light waves passing from diamond to air.
11 Which of the following completed statements is incorrect?
The sky is reflected in a bucket of water. To increase the intensity of the reflection a person should....
View the reflection from close to the level of the water surface.
12 Ice has a refractive index of 1.32. Water has a refractive index of 1.33 and acrylic plastic has a refractive index of 1.5.
Artists use plastic imitation ice cubes when they photograph drinks for advertisements. They use the plastic because ....
Plastic cubes reflect more light than ice cubes when under water.
13 Which of the following mirrors reflects the highest percentage of incident light.
... The prisms in a pair of binoculars.
14 Newton used silver mirrors in his telescopes. Silver is no longer used because...
... silver tarnishes.
15 The refractive index of glass is 1.50.
The critical angle for total internal reflection for glass in air, is ...
... 43°
16 The glass of question 15 is submerged in water.
The critical angle for total internal reflection....
... is increased.
17 Small air bubbles rising in a glass of coke appear to be silver because....
... of total internal reflection in the water.
18 Which statement is correct?
Newton described seven spectral colors - ROYGBIV
19 Which diagram correctly shows dispersion in a glass prism?
| a |
b |
d |
20 An inferior mirage (which gives the appearance of water on a hot road) is due to....
... total internal reflection
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