Q- You have obtained a diffraction pattern on a distant screen from a plane diffraction grating consisting of alternate transparent and opaque lines with widths a and b respectively. How will the pattern be affected if the widths a and b are interchanged? Consider
(a) Change in intensity
(b) Absen…
Q- An object 5 cm high is located 73 cm from a converging lens of focal length f1 = 45 cm. A second converging lens of focal length f2 is located 178 cm from the first lens. An image of the object is to be formed on a screen 200 cm from the second lens. What must be the focal length f2 of the second…
Q- Two in-phase loudspeakers are located at (x, y) coordinates (-2.5 m, +2.0 m) and (-2.5 m, -2.0 m). They emit identical sound waves with a 1.6 m wavelength and amplitude a. Determine the amplitude A of the sound at the five positions on the y-axis (x = 0) with the y values 0, 0.5 m, 1.0 m, 2.0 m.
…Q- Work is done on the water by a rotating paddle wheel, which is driven by two blocks falling at a constant speed. The temperature of the stirred water increases due to friction between the water and the paddles. If the energy lost in the bearings and through the walls is neglected, then the loss i…
Q- If two point objects close together are to be seen as two distinct objects, the images must fall on the retina on two different cones that are not adjacent. That is, there must be an unactivated cone between them. Assume the separation of the cones is 0.8 µm. Model the eye as a uniform 2.2 cm dia…
Comments