 # PHY108 CUNY Borough of Manhattan Community College: Wavelenghts Physics Questions Anonymous

### Question Description

Homework problems: Chapters 15-16

• Suppose that water waves have a wavelength of 2.4 m and a period of 0.5 seconds. What’s the velocity of these water waves?

• A sound wave has a velocity of 334 m/s and a frequency of 400 Hz. What’s the wavelength of the sound? What type of waves are sound waves?

• Two waves propagate from different directions on the same rope. Suppose they have the same amplitude 0.2 m. What’s the possible maximum and minimum fluctuation of the rope, respectively?

• The tension force on a string is 80 N. The mass of the string is 0.1 kg and the length is 0.5 m. What will be speed of waves produced on the string?

• An orange light has a frequency of 6x1014 Hz. What’s its wavelength? What type of waves are light waves?

• Please list all known electromagnetic waves in order of frequency from highest to lowest.
• What is electromagnetic induction and what are its applications?

Homework problems: Chapter 17

• A laser beam reaches surface of a glass block with an incident angle of 45⁰.
1) Please draw a schematic diagram to show reflection ray and refraction ray.
2) If glass has an index of refraction of 1.5, what’s the speed of light in glass.

• A converging lens has a focus length of 10 cm. A pencil stands on its optic axis with a distance of 15 cm from the lens.
a) Please draw three principal rays to find the image of the pencil;
b) What’s the image distance?
c) Is it magnified? Is the image inverted?

• A concave mirror has a focal length of 10 cm. Please draw two principal rays to find the image of a pencil standing 15 cm away from it.

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Homework problems: Chapters 15-16 1. Suppose that water waves have a wavelength of 2.4 m and a period of 0.5 seconds. What’s the velocity of these water waves? 2. A sound wave has a velocity of 334 m/s and a frequency of 400 Hz. What’s the wavelength of the sound? What type of waves are sound waves? 3. Two waves propagate from different directions on the same rope. Suppose they have the same amplitude 0.2 m. What’s the possible maximum and minimum fluctuation of the rope, respectively? 4. The tension force on a string is 80 N. The mass of the string is 0.1 kg and the length is 0.5 m. What will be speed of waves produced on the string? 5. An orange light has a frequency of 6x1014 Hz. What’s its wavelength? What type of waves are light waves? 6. Please list all known electromagnetic waves in order of frequency from highest to lowest. 7. What is electromagnetic induction and what are its applications? Homework problems: Chapter 17 1. A laser beam reaches surface of a glass block with an incident angle of 45⁰. 1) Please draw a schematic diagram to show reflection ray and refraction ray. 2) If glass has an index of refraction of 1.5, what’s the speed of light in glass. 2. A converging lens has a focus length of 10 cm. A pencil stands on its optic axis with a distance of 15 cm from the lens. a) Please draw three principal rays to find the image of the pencil; b) What’s the image distance? c) Is it magnified? Is the image inverted? 3. A concave mirror has a focal length of 10 cm. Please draw two principal rays to find the image of a pencil standing 15 cm away from it. ...
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andythewxman
School: New York University  Attached.

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