Light Beams a and B Have the Same Intensity but the Wavelength

question 58

Multiple Choice

Light beams A and B have the same intensity but the wavelength associated with beam A is longer than that associated with beam B.The photon flux (number crossing a unit area per unit time) is:

• A)greater for A than for B
• B)greater for B than for A
• C)the same for A and B
• D)greater for A than for B only if both have short wavelengths
• E)greater for B than for A only if both have short wavelengths