Cone-shaped retinal cells respond to the brightness or intensity of light. Agree or Disagree?
In Young's experiment fifth bright fringe produced by light of 4000Å superposes on the fourth bright fringe of an unknown wavelength. Find the unknown wavelength.
With the help of a diagram describe how compression and rarefaction pulses are produced in air near a source of sound. (AS_5)
The process of loading at the source produces a hypertonic condition in the phloem.
In a double-slit experiment, fringes are produced using light of wavelength 4800A^(@) . One slit is covered by a thin plate of glass of refractive index 1.4 and the other slit by another plate of glass of same thickness and of refractive index 1.7. On doing so, the central bright fringe shifts to a position originally occupied by the fifth bright fringe from the centre. find the thickness of the glass plates.
