Q.1.
The angle of incidence at which reflected light is totally polarised for reflection from air to glass ( refractive index n)
Q.2.
An unpolarised beam of intensity I0 is incident on a pair of nicols making anglewith each other. The intensity of light emerging from the pair is :
Q.3.
What does not change on polarisation of light ?
Q.4.
On passing a plane wavefront through a concave lens, we get a
Q.5.
A point source of light creates..... ........... wavefront
Q.6.
Tan(p) = n is known as
Q.7.
Coherent sources have same
Q.8.
In single slit diffraction experiment, on moving sreen away from the slit angular width of fringes would
Q.9.
In youngs double slit experiment a path difference ofwavelength at a point would give ........... fringe
Q.10.
As per Huygens principle, wavelets originating on a wavefront grow with
Q.11.
Superposition of family of waves originating from a slit forms......... pattern
Q.12.
Concave lenses or diverging lenses, always produce images that are .....
Q.13.
Using the fact that light travels at 3.0xm/s find the frequency of yellow light. (wavelength of yellow light is 5.x 10-7 m)
Q.14.
Calculate the frequency of green light in a vacuum with a wavelength of 5.x-m and a speed (c) of 3.x 108?
Q.15.
Solve this problems using the equation: c = λν Calculate the wavelength of light that has a frequency of 5.2 x 1012/s. The speed of of light is 3.xm/s.
Q.16.
A microwave oven emits a light wave at a wavelength of 0.m. What is the frequency of this radiation?
Q.17.
If the velocity of light in a medium depends on its frequency, the medium is said to be
Q.18.
Calculate the wavelength of light that has a frequency of 5.2 xHz.
Q.19.
The ratio of intensity of Maxima and Minima for the in the interference of two waves with amplitude a_1a and a2 a_{}a2 ​ is
Q.20.
When you go out to sun, ultraviolet light rays give you your tan. What is the wavelength of this light if it has a frequency of7.XHz?