[" 19.To observe diffraction,the size of the "],[" obstacle; "]

Statement I : To observe diffraction of light, the size of obstacle or aperture should be of the order of 10^(-7) m. Statement II : 10^(-7) m is the order of wavelength of visible light.

Assertion: To observe diffraction of light the size of obstacle/aperture should be of the order of 10^-7m . Reason: 10^-7m is the order of wavelength of visible light.

Assertion: To observe diffraction of light the size of obstacle/aperture should be of the order of 10^-7m . Reason: 10^-7m is the order of wavelength of visible light.

For observing diffraction it is essential to have

It is difficult to observe diffraction in case of light because

A: When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. R: Waves diffracted from the edge of the circular obstacle interfere constructively at the centre of the shadow producing a bright spot.