Explain why two flashlights held close together do not produce an interference pattern on a distant screen?

Explain why liverworts lie close to the ground.

Monochromatic light from a narrow slit illuminates two parallel slits producing an interference pattern on a screen. The separation between the two slits is now doubled and the distance between the screen and the slits is reduced to half. The fringe width

Statement I: For the situation shown in figure two identecal coherent light sources produce interference pattern on the screen. The intensity of minima nearest to S_(1) is not exactly zero. Statement II: Minimum intensity is zero, when interfering waves have same intensity at the location of superposition.

Explain why some planets do not have atmosphere.

In a Young's double slit experiment, light of 500 nm is used to produce an interference pattern. When the distance between the slits is 0.05 mm, the angular width (in degree) of the fringes formed on the distance screen is close to:

Why don't we hav interference when two candles are placed close to each other and the intensity is seen at a distant scree? What happens if the candles are replaced by laser sources?

Explain why the planets do not twinkle?

Two slits spaced 0.450nm apart are placed 75.0 cm from a screen. What is the distance between the second and third dark lines of the interference pattern on the screen when the slits are illuminated with coherent light with a wavelength of 500nm?

In Young's double slit experiment, if the two slits are illuminated with separate sources, no interference pattern is observed because

If an interference experiment is performed using two wavelengths close to each other, two interference patterns corresponding to the two wavelengths are obtained on the screen. The frings system remains distinct up to a point on the screen where the n^("th") order maximum of one wavelength falls on the n^("th") order minimum of the other wavelength. Suppose in Young's double sit experiment, sodium light composed of two wavelengths lambda_(1)and lambda_(2) close to each other (with lambda_(2) greater than lambda_(1) ) is used. The order n, up to which the fringes can be seen on the screen, is given by