alleryA prism's deviation measures the angle between
AIts two internal normals
BIts base and the internal ray
CIncident and emergent directions
DIts two refracting faces
Answer & Solution
Correct answer: C. Incident and emergent directions
Deviation measures the change from the original incident direction to the emergent ray's direction.
Keep practising Ray Optics and Optical Instruments
Browse all Ray Optics and Optical Instruments questions for ICSE Class 10, or explore more Physics topics.
Related questions
Prism A=60°, incidence 40°, deviation 30°. Reverse the path. New incidence?Normal entry: 30° prism in air, n=1.5. Given sin^-1(0.75)=48.6°. Deviation?In vacuum, infrared λ=1 μm and UV λ=0.25 μm. Which frequency is greater?Vacuum radiation f=10^15 Hz; c=3×10^8 m/s. Which wavelength and band fit?Light: air λ=600 nm, c=3×10^8; glass speed=2×10^8 m/s, frequency unchanged. Glass λ?A water-air ray is 35° to the surface. Critical angle=48°. What follows?Glass n=1.5, sin i=0.8. Outside is air n=1 or water n=4/3. TIR occurs withNormal entry into a 30° prism in air, n=1.5. At its next face, sin emergence is