Yellow light is refracted through a prism producing minimum

Light of different wavelengths (different colors) present in white light have different speed. Hence, these deviate through different angles inside the prism and get separated.

No, it will not show dispersion. It will only show deviation.

After refraction at two parallel faces of a glass slab, a ray of light emerges in a direction parallel to the direction of incidence of white light. As rays of...

No, this is because the dispersion of light cannot occur through a hollow prism containing air.

(c) its wavelength decreases but frequency remains unchanged EXPLANATION:    When light is refracted into a medium its speed changes but the frequency remains the same because the energy associated with a...

(b) Frequency.

The correct answer is (b) δ

From the definition of critical angle, if refracted angle is more than 90°, then reflection occurs, which is known as total internal reflection. So, maximum angle of refraction is 90°.

(b) Frequency does not change on refraction EXPLANATION:    When light is refracted into a medium its speed changes but the frequency remains the same because the energy associated with a photon...

Angle of incidence i = (A + δm)/2 Concept : i + e = A + δ But at minimum angle of deviation, i = e