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Eleventh Grade (Grade 11) Light and Optics Questions

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Grade 11 Light and Optics
What is the frequency of an electromagnetic wave with a wavelength of 1.0×105 m?
  1. 1.0×1013 Hz
  2. 3.0×103 Hz
  3. 3.0×1013 Hz
  4. 1.0×103 Hz
Grade 11 Light and Optics
When light rays pass through a convex lens, as in the image shown, what happens to the rays and the perceived image of the object?
Optics - Convex Lens
  1. The light rays diverge, magnifying the perceived image.
  2. The light rays converge, magnifying the perceived image.
  3. The light rays diverge, reducing the perceived image.
  4. The light rays converge, reducing the perceived image.
Grade 11 Light and Optics
When light rays strike a surface, they bounce off in a process called                .
  1. reflection
  2. refraction
  3. diffraction
  4. interference
Grade 11 Light and Optics
What is the wavelength of microwaves of 3.0×109 Hz frequency?
  1. 0.050 m
  2. 0.060 m
  3. 0.10 m
  4. 0.20 m
Grade 11 Light and Optics
What is the name of the medium that electromagnetic waves propagate through?
  1. Electromagnetic string
  2. Electromagnetic air
  3. Aether
  4. They do not require a medium to propagate.
Grade 11 Light and Optics
Which of the following is an example of refraction?
  1. A parabolic mirror in a car headlight will focus light into a beam.
  2. A fish appears closer to the surface of the water than it really is when observed from a riverbank.
  3. In a mirror, when you lift your right arm, the left arm of your image is raised
  4. Light creating interference patterns.
Grade 11 Light and Optics
If a light ray strikes a flat mirror at an angle of 29° from the normal, the ray will reflect                                              .
  1. 29° from the normal
  2. 27° from the normal
  3. 29° from the mirror's surface
  4. 61° from the normal
Grade 11 Light and Optics
In the diagram shown below, the image of object B would be                                  .
  1. virtual, magnified, and inverted.
  2. real, magnified, and upright.
  3. virtual, diminished, and upright.
  4. virtual, magnified, and upright.
Grade 11 Light and Optics
In the diagram shown above, the image of object A would be                                  .
  1. virtual, magnified, and upright.
  2. virtual, diminished, and upright.
  3. real, magnified, and inverted.
  4. real, diminished, and inverted.
Grade 11 Light and Optics
Which of the following DOES NOT describe the image formed by a flat plane mirror?
  1. magnified
  2. upright
  3. virtual
  4. same size
Grade 11 Light and Optics
In the diagram shown above, the image of object B would be                                  .
  1. real, diminished, and inverted.
  2. virtual, magnified, and upright.
  3. real, magnified, and inverted.
  4. virtual, diminished, and upright.
Grade 11 Light and Optics
You notice your image in a concave mirror is inverted. What should you do to make your image upright and magnified?
  1. Rotate the mirror.
  2. Move away from the mirror.
  3. Move closer to the mirror.
  4. Use a convex mirror instead.
Grade 11 Light and Optics
The normal to the surface is drawn                   to the surface.
  1. parallel
  2. tangential
  3. perpendicular
  4. none of the above
Grade 11 Light and Optics
A light ray travels from air (n=1.00) into a glass block (n=1.50) parallel to the normal, i.e., the angle of incidence is 0°. Which of the following is true?
  1. The speed of light in the glass block is lower than in air.
  2. The light ray has an angle of refraction of 21°.
  3. The light ray is totally internally reflected.
  4. The speed of light in the glass block is higher than in air.
Grade 11 Light and Optics
A light ray passes from brookite (n = 2.583) into water (n = 1.333) at an angle of 45°. The light ray will be                       .
  1. refracted at 87.6°
  2. refracted at 22.9°
  3. internally reflected
  4. not enough information
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