Question

1. which of the following statements is false?

a) a radio wave has a higher frequency than red light.
b) an ultraviolet wave has higher frequency than red light.
c) a microwave has a higher frequency than a radio wave.
d) a red light has a higher frequency than a microwave.

1. the units of frequency are

a) hz
b) f
c) seconds
d) m/s

1. the units of period are

a) hz
b) f
c) seconds
d) m/s

1. the units of hertz are the same as the units of

a) seconds²
b) m/s
c) 1/seconds
d) 1/m

1. the units of wavelength are

a) seconds
b) inches
c) meters
d) miles

1. which of the following greek letters is used to represent wavelength?

a) π
b) λ (lamda)
c) δ
d) σ

1. the variable or symbol used to represent period is

a) t
b) t
c) p
d) s

1. the number of cycles completed each second is called the

a) frequency
b) wavelength
c) wave speed
d) period

Explanation:

• Question 8: Frequency is measured in Hertz (Hz). The unit \(f\) is not standard for frequency, seconds is for time - related quantities (not frequency), and \(m/s\) is for speed.
• Question 9: Period (\(T\)) is the time taken for one complete cycle. Its unit is seconds. \(Hz\) is for frequency, \(f\) is not the unit for period, and \(m/s\) is for speed.
• Question 10: Hertz (\(Hz\)) is defined as \(1/seconds\). Seconds\(^2\) is not related to frequency, \(m/s\) is speed, and \(1/m\) is not the unit for frequency.
• Question 11: Wavelength (\(\lambda\)) is a length - related quantity. In the SI system, the standard unit for length is meters. Seconds is for time, inches is a non - SI unit (not typically used in scientific wave - related calculations in the SI context), and miles is also a non - SI unit.
• Question 12: The Greek letter \(\lambda\) (lambda) is used to represent wavelength. \(\pi\) is used in many mathematical and physical formulas (e.g., in circle - related formulas or in some quantum mechanical formulas), \(\Delta\) is used to represent a change (e.g., \(\Delta x\) for change in position), and \(\Sigma\) is used for summation.
• Question 13: The variable \(T\) is commonly used to represent period. \(t\) is often used for time in a more general sense (not specifically period in the wave - related formulae where \(T\) is standard), \(P\) can be used for power, pressure etc., and \(s\) is not the standard symbol for period.
• Question 14: Frequency (\(f\)) is defined as the number of cycles completed per second. Wavelength (\(\lambda\)) is the distance between two consecutive crests or troughs, wave speed (\(v\)) is given by \(v = f\lambda\), and period (\(T\)) is the time taken for one cycle (\(T=\frac{1}{f}\)).

Answer:

1. a) Hz
2. c) seconds
3. c) 1/seconds
4. c) meters
5. b) \(\lambda\)
6. a) \(T\)
7. a) frequency