A tube of length 30 cm has its inner lateral surface blackened. Two lenses of focal lengths
10cm and 20 cm are fixed at the ends of the tube. For same beam, intensities of spots on
screen are I1 and I2 for arrangement (1) and arrangement (2). If the ratio of I2 : I1 is of the form
N2, find N
A tube of length 30 cm has its inner lateral surface blackened. Two lenses of focal lengths
10cm and 20 cm are fixed at the ends of the tube. For same beam, intensities of spots on
screen are I1 and I2 for arrangement (1) and arrangement (2). If the ratio of I2 : I1 is of the form
N2, find N
10cm and 20 cm are fixed at the ends of the tube. For same beam, intensities of spots on
screen are I1 and I2 for arrangement (1) and arrangement (2). If the ratio of I2 : I1 is of the form
N2, find N
harsh , 5 Years ago
Grade 12
