Situation a metallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and is used as a diffraction grating for microwaves. a wide parallel beam of microwaves is incident normally on the grating. in the situation above, the microwave wavelength is 6.0 cm. the largest angle from the normal, at which an intensity maximum occurs, is closest to: situation a metallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and is used as a diffraction grating for microwaves. a wide parallel beam of microwaves is incident normally on the grating. in the situation above, the microwave wavelength is 6.0 cm. the largest angle from the normal, at which an intensity maximum occurs, is closest to: 69° 84° 74° 79° 64°