Which of these statements is/are true ?
I. As wavelength increases, frequency decreases.
II. As energy increases, frequency decreases.
III. As wavelength increases, energy decreases.
IV. The product of wavelength and frequency is constant.
A) I, III, and IV
B) I and II
C) I, II, and IV
D) III and IV
E) II, III, and IV

Question

Which of these statements is/are  true ?
I. As wavelength increases, frequency decreases.
II. As energy increases, frequency decreases.
III. As wavelength increases, energy decreases.
IV. The product of wavelength and frequency is constant.
A) I, III, and IV
B) I and II
C) I, II, and IV
D) III and IV
E) II, III, and IV

Quizplus · Accepted Answer

I is true based on the formula c = λν, where c is the speed of light and λ is wavelength. 
III is true based on the formula E = hν, where E is energy and h is Planck's constant. 
IV is true based on the formula c = λν, where c is the speed of light and λ is wavelength. Therefore, the product of wavelength and frequency is a constant (c). 
However, II is false because as energy increases, frequency increases (based on the formula E = hν).

Which of These Statements Is/are True