1) Which ray strikes the surface of a medium first? a) Refracted ray b) Emergent ray c) Incident ray d) Normal 2) Which ray bends while entering a new medium? a) Incident ray b) Refracted ray c) Emergent ray d) Normal 3) The line perpendicular to the surface at the point of incidence is called? a) Incident ray b) Emergent ray c) Normal d) Refracted ray 4) Which ray emerges back into the original medium after passing through another medium? a) Incident ray b) Refracted ray c) Normal d) Emergent ray 5) In a diagram of refraction, the ray that approaches the boundary is labeled as? a) Emergent ray b) Refracted ray c) Incident ray d) Normal 6) The imaginary line at 90° to the surface at the point of contact is? a) Refracted ray b) Normal c) Incident ray d) Emergent ray 7) Which ray exits a prism or glass block into air? a) Refracted ray b) Emergent ray c) Normal d) Incident ray 8) The bending of light occurs at the.. a) Normal b) Emergent ray c) Incident ray d) Boundary of two media 9) Light slows down and bends towards the normal when.. a) Entering a denser medium b) Exiting to rarer medium c) Moving parallel to surface d) Incident ray 10) The bending of light depends on: a) Color of light b) Temperature c) Size of light source d) Optical densities of the media

Explain the terms of refraction of light

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