What is blue shift? Sodium light of wavelength `589.0overset(@)A` travelling from a galaxy is observed to be `589.6overset(@)A`. What is the speed of the galaxy?

A light of wavelength 3200overset(@)A is coming from a star. What is the limit of resolution of a telelscope whose objective has a diameter of 86 inch?

Two slits are 1mm apart and a screen is placed at some distance. When the slits are illuminated with light of wavelength 500nm, fringe separation obtained on the screen is 0.5mm. What is the distance between the screen and the slits?

With what speed should a galaxy move with respect to the earth so that sodium line at 589 nm is observed at 589.6nm?

A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water. In a submarine equipped with a SONAR the time delay between generation of a probe wave and the reception of its echo after reflection from an enemy submarine is found to be 77.0 s. What is the distance of the enemy submarine? (Speed of sound in water = 1450 m s^(-1) )

Explain what is red shift and blue shift of light wave.

Yellow light of wavelength 6000Å produces fringes of width 0.8 mm in Young's double slit experiment. What will be the fringe width of the light source if it is replaced by another monochromic source of wavelength 7500Å and sepearation between the slits is doubled?

A uniform rope of length 12 m amd mass 6 kg hangs vertically from a rigid support.A block of mass 2 kg is attached to the free end of the rope.A transverse pulse of wave length 0.06m is produced at the lower end of the rope.What is the wavelength of the pulse when it reaches the top of the rope?

What is the de-Broglie wavelength of an electron in the Bohr's orbit of radius 0.51 overset(@)A in hydrogen atom?