Wave Optics Tes...

In a double slit experiment instead of taking slits of equal widths, one slit is made twice as wide as the other. Then, in the interference pattern.

A fixed source emits sound of frequency 1000 Hz. What is the frequency as heard by a observer at rest?

Which of the following principles is being used in Sonar Technology?

In Doppler effect when the source is moving away from the observer at rest, the correct equation is:

If Young's double slit experiment is done with white light, which of the following statements will be true?

In a Young's double slit experiment the intensity of the resultant wave at a point P on the screen is I where the path difference between the waves from coherent sources $$S_1$$ and $$S_2$$ is $$\lambda$$. Then the intensity of the resultant wave at a point where the path difference is $$\lambda /4$$ is given by.

If the wavelength of light used is $$6000\mathring { A } $$. The angular resolution of telescope of objective lens having diameter $$10cm$$ is ______ rad

With the help of a telescope that has an objective of diameter $$200cm$$, it is proved that light of wavelengths of the order of $$6400\mathring { A } $$ coming from a star can be easily resolved. Then the limit of resolution is

Two coherent point sources of sound wave $$S_1$$ and $$S_2$$ produce sound of same frequency 50 Hz and wavelength 2 cm with amplitude 2 x $$(10)^-$$$$^3$$ m. Each circular arc represents a wavefront at a particular time and is separated from next arc by a distance 1 cm. Both the sound waves propagate through the medium and interfere with each other. Read paragraph carefully and answer the following questions. [r = 1 cm] 
The point (s) where constructive interference occurs 

Monochromatic light of wavelengths $$400$$ nm and $$560$$ nm are incident simultaneously and normally on double-slit apparatus whose slit separation is $$0.1$$ mm and screen distance is $$1 m$$. Distance between areas of total darkness will be ___ mm