A slit of width is illuminated by white light. For red light `(lambda=6500Å)`, the first minima is obtained at `theta=30^@`. Then the value of will be

A slit of width a is illuminated by white light. For red light (lambda=6500Å) , the first minima is obtained at theta=30^@ . Then the value of a will be

A slit of width a illuminated by red light of wavelength 6500 Å . The first minimum will fall at theta=30^(@) if a is

A slit of width a is illuminiated by white light. The first diffraction minimum for light of lamda=6500 Å is formed at theta=30^(@) , then the width a of the slit is

A slit of width a is illuminiated by white light. The first diffraction minimum for light of lamda=6500 Å is formed at theta=30^(@) , then the width (a) of the slit is

A slit of width a is illuminated by white light. For what value of a does the first minimum for red light of wavelength 650 nm fall at angle of diffraction theta=15^(@) ?

A slit of width d is illuminated by white light. For what value of d is the first minimum for red light of lambda = 650 nm , located at point P at 30^(@) . For what value of the wavelength of light will the first diffraction maxima also fall at P ?