Question

Which graph represents the following original waves?

(a) at time (T/4) later (Figure A, B, C, D, or E)

(b) at time (T/2) later (Figure A, B, C, D, or E)

(c) With amplitude 3.5 times larger than the original amplitude (Figure A, B, C, D, or E)

(d) With wavelength 2 times larger than the original wavelength (Figure A, B, C, D, or E)

(e) With frequency 3.5 times larger than the original frequency (Figure A, B, C, D, or E)

Answer 1

a) Figure C represents the wave at time T/4.

b) Figure B represents the wave at time T/2. (the wave has moved more to the right in T/2 )

c) In figure D, the amplitude is about 10 which is 3*3.5. Hence figure D represents the wave with amplitude 3.5 times larger than the original amplitude.

d) The wavelength of the original wave = 2m. The wavelength in figure E = 4m. Hence figure E represents the wave with the wavelength 2 times larger than the original wavelength.

e) Figure A has 3.5 more cycles than the original wave. Hence figure A represents the wave with frequency 3.5 times larger than the original frequency.