Light from a location on which you concentrate your attention falls on your fovea, which contains only cones. If you wish to observe a weak source of light, like a faint star, why should you not look directly at the source?

What is Multichromatic light?

Two radio antennas separated by d = 302 m, as shown in the figure below, simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1,040 m from the center point between the antennas, and its radio receives the signals. Hint: Do not use the small-angle approximation in this problem. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 400 m northward, what is the wavelength of the signals? m (b) How much farther must the car travel from this position to encounter the next minimum in reception?

The image shows the spectra of two objects, labeled 1 and 2. Which of the following statements is a correct interpretation of these spectra? Intensity 1 2 Wavelength O object 1 is younger than object 2 object 1 is brighter than object 2 at all wavelengths object 2 is farther from us than object 1 object 1 emits less red light than object 2 object 2 emits more blue light than object 1