Physics Electromagnetic Waves Level: Misc Level
Unpolarized light in incident on the first of two polarizers with an intensity I (max).The light intensity after passing through the second polarizer is found to be 13% I (max).What is the angle between the two polarizers?
Physics Electromagnetic Waves Level: Misc Level
A soap film is 130 n m thick. What is the shortest wavelength of visible light that will produce constructive interference in the film? The index of refraction of the soap is 1.33 and there is air on the other side.
Physics Electromagnetic Waves Level: Misc Level
A single slit 2.1 mm wide is illuminated by light of wavelength 505 n m . A diffraction pattern is seen on a screen 3.0 m from the slit. What is the linear distance on the screen between the first two diffraction minima on either side of the central max?
Physics Electromagnetic Waves Level: Misc Level
Light of wavelength 431 n m passes through two slits.In the resulting interference pattern on a screen 3.9 m away, adjacent bright fringes are separated by 2.7 m m. What is the separation of the two slits?
Physics Waves And Oscillations Level: Misc Level
A child riding a bicycle north at 6 m/s hears a 600 -Hz siren from a police car heading south at 15 m /s. What is the frequency heard by the child?
Physics Waves And Oscillations Level: Misc Level
A person stranded in a car blows a 400 Hz horn. What frequencies are heard by the driver of a car passing at a speed of 60 km /h?
Physics Waves And Oscillations Level: Misc Level
A 3.0W sound source is located 6.5 m from an observer. What are the intensity and the intensity level of the sound heard at that distance?
Physics Waves And Oscillations Level: Misc Level
An isometric source of sound broadcasts a power of 60 W. What are the intensity and the intensity level of a sound heard at a distance of 4 m from this source?
Physics Waves And Oscillations Level: Misc Level
A 60- d B sound is measured at a particular distance from a whistle. What is the intensity of this sound in W /m ^2?
Physics Waves And Oscillations Level: Misc Level
What is the intensity level in decibels of a sound that has an intensity Of 4 X 10 ^- 5 W /m ^2 ?
Physics Waves And Oscillations Level: Misc Level
When a 800 gram was attached to a spring, it executes a S H M with frequency o 5 Hz. How mass ( grams ) do you replace with the same spring so that the frequency of S H M is 20 Hz?
Physics Waves And Oscillations Level: Misc Level
A pendulum has a period of 2- seconds at a place where 2 =9.081 m/s^2. In order to keep the same periodic time, at another place where 2 =9.821 m /s^2 What is the change in length ( mm).
Physics Kinematics Level: Misc Level
A spherical steel ball of 5 kg mass rolls downhill starting from rest through a distance of 5 meters at 10 degrees to the horizontal floor. What is the velocity ( m/ s )?
Physics Force & Laws Of Motion Level: Misc Level
A circus clown places a beam of 400 Ib weight and lenght of 10 ft. on a horizontal table sticking out at a certain maximum distance. The clown of 100 Ib weight walks on the beam to the very end without any fear to fall down.The distance sticking out in feet is?
Physics Force & Laws Of Motion Level: Misc Level
A 5 - meter ladder of 20 kg mass is placed against a smooth wall with a maximum angle preventing its slipping on a rough floor with a static coefficient of a fraction =0.45. The maximum angle is?
