Optics Answers

An acrobat swings from a trapeze with a frequency of 0.5Hz what is the length of the trapeze cable ?

What is Interference of light? What are coherent source? Give the condition for well-defined and Sustened interference.

A parallel plate capacitor is charged to 100v.its plate separation is 2mm and the area of separation of each plate is 120cm^2.calculate and account for the increase and decrease in energy when separation is reduced to 1mm at constant voltage and charge

A ray of light passes from glass (ng 1.5) to water (ng 1.33) what is critical angle of incidence

A sound source of frequency 1000 Hz moves at 40.0 m/s toward a listener who is at rest. What is the apparent frequency heard by the listener? (speed of sound = 340 m/s)

A damped harmonic oscillator is described by the solution of the

differential equation

(d^2y/dt^2)+2beta(dX/dT)+w^2*y=0

An observer determines that the amplitude of the oscillator decreases

by 18.0% in 50.0 seconds, which is much longer than the oscillation

period of the damped oscillator.

How long will it take for the energy of the oscillator to be reduced to

half its original value?

A ray of light in the air strikes a glass plate (n=1.5) at an incidence angle of 50°. determine the angle of transmission.

A concave spherical mirror has a focal length of 5 cm an object o,3 cm height, is placed 8 cm in front of the mirror.by constructing a ray diagram, determine the position and height of it's image.

The speed of sound in air at 20°C is 344 m/s. (a) What is the wavelength of a sound wave with a frequency of 784 Hz, corresponding to the note G5 on a piano, and how many milliseconds does each vibration take? (b) What is the wavelength of a sound wave one octave higher than the note in part (a)?

An amusement park ride consists of a rotating circular platform 12.2 m in diameter from which 10 kg seats are suspended at the end of 2.76 m massless chains. When the system rotates, the chains make an angle of 25.2 ◦ with the vertical. The acceleration of gravity is 9.8 m/s 2 . What is the speed of each seat? Answer in units of m/s.