A thin prism `P_1` of angle `4^0` and refractive index 1.54 is combined with another thin prism `P_2` of refractive index 1.72 to produce dispersion without deviation.The angle of prism `P_2` is

A thin prism P of refracting angle 3^(@) and refractive index . 1.5 is combined with another thin prism Q of refractive index 1.6 to produce dispersion without deviation. Then the angle of prism Q is

A thin prism P_(1) with angle 6^(@) and made from glass of refractive index 1.54 is combined with another thin prism P_(2) of refractive index 1.72 to produce dispersion without deviation. The angle of prism P_(2) will be

A thin prism P_(1) with angle 4degree and made from glass of refractive index 1.54 is combined with another thin prism P_(2) made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of the prism P_(2) is

A thin prism P with angle 4^(@) and made from glass of refractive index 1.54 is combined with another thin prism P made from glass of refractive index 1.72 to produce dispersion without deviation The angle of prism P is

A thin glass prism of angle 6^(@) of refractive index 1.5 is combined with another glass prism of refractive index 1.6 to produce dispersion without deviation. What is the angle of the second prism ?

A thin prism of angle 6^(@) made up of glass of refractive index 1.5 is combined with anorher prism made up of glass of refractive index 1.75 to produce dispersion without deviation. The angle of second prism is

A small angled prism of refractive index 1.4 is combined with another small angled prism of refractive index 1.6 to produce disperison without deviation. If the angle of first prism is 6(@) , then the angle of the second prism is

A thin prism having refreacting angle 10^(@) is made of galss refractive index 1.42. This prism is combined with another thin prism glass of refractive index 1.7 This Combination profuces dispersion without deviation. The refreacting angle of second prishm should be