Class 10 · ICSE · Physics

Refraction of Light at Plane Surfaces

Laws of refraction, refractive index, total internal reflection and critical angle.

Questions: 14
PYQs: 0
Topics: 2

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Refractive Index1 Total Internal Reflection1

Questions

14 questions in this chapter.

Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
When a ray of light passes from air into glass, its:
1 markMediumMCQ
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
State the two conditions necessary for total internal reflection to take place.
3 marksMediumShort answer
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
The refractive index of a medium in which light travels at 2 × 10⁸ m s⁻¹ is:
1 markEasyMCQ
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
Explain how total internal reflection makes an optical fibre able to carry light round bends.
3 marksMediumApplication based
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
The refractive index of glass is 1.5 and the speed of light in vacuum is 3 × 10⁸ m s⁻¹. Calculate the speed of light in glass.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
A ray of light travelling in air strikes a glass surface at an angle of incidence of 60°. If the refractive index of glass is 1.5, find the sine of the angle of refraction.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
A tank is filled with water to a depth of 40 cm. If the refractive index of water is 4/3, find the apparent depth of the tank.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
Total internal reflection can take place only when light passes from:
1 markMediumMCQ
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
State the laws of refraction of light.
2 marksEasyShort answer
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
The critical angle for a certain medium is 30°. Calculate its refractive index.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
Why does a coin at the bottom of a beaker of water appear to be raised?
3 marksMediumApplication based
Answer available
Class 10 · Physics · Refraction of Light at Plane Surfaces
Draw a ray diagram to show the path of a ray of light passing through a rectangular glass slab, and state the relation between the incident and emergent rays.
3 marksMediumDiagram based

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