A ray of light of wavelength 5400 Å suffers refraction from air to glass. Taking η g a = 3 2 , find the wavelength of light in glass.

Given, The refractive index of glass with respect to air is η g a = 3 2 . The wavelength of light in air is λ = 5400 Å = 5400 × 10 - 10 m . Speed of light in air is c = 3 × 10 8 m s - 1 . So, the frequency of light which remains the same while traveling to another mediums also is f = c λ = 3 × 10 8 m s - 1 5400 × 10 - 10 m = 5 . 56 × 10 14 Hz . Now, the speed of light in glass is v g = c η g a = 3 × 10 8 m s - 1 3 2 = 2 × 10 8 m s - 1 . Thus, the wavelength of light in glass is λ g = v g f = 2 × 10 8 m s - 1 5 . 56 × 10 14 Hz = 0 . 36 × 10 - 6 m = 3600 × 10 - 10 m = 3600 Å .

A ray of light of wavelength 5400 Å suffers refraction from air to glass. Taking η g a = 3 2 , find the wavelength of light in glass.

Given, The refractive index of glass with respect to air is η g a = 3 2 . The wavelength of light in air is λ = 5400 Å = 5400 × 10 - 10 m . Speed of light in air is c = 3 × 10 8 m s - 1 . So, the frequency of light which remains the same while traveling to another mediums also is f = c λ = 3 × 10 8 m s - 1 5400 × 10 - 10 m = 5 . 56 × 10 14 Hz . Now, the speed of light in glass is v g = c η g a = 3 × 10 8 m s - 1 3 2 = 2 × 10 8 m s - 1 . Thus, the wavelength of light in glass is λ g = v g f = 2 × 10 8 m s - 1 5 . 56 × 10 14 Hz = 0 . 36 × 10 - 6 m = 3600 × 10 - 10 m = 3600 Å .

HARD

10th ICSE

IMPORTANT

Earn 100

A ray of light of wavelength $5400 Å$ suffers refraction from air to glass. Taking ${}_{a}η_{g} = \frac{3}{2}$ , find the wavelength of light in glass.

Important Questions on Refraction of Light at Plane Surfaces

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 1

What is a prism? With the help of a diagram of the principal section of a prism, indicate its refracting surfaces, refracting angle and base.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 2

Diagrams (a) and (b) in the figure below show the refraction of a ray of light of single colour through a prism and a parallel sided glass slab respectively. In each diagram, label the incident, refracted, emergent rays and the angle of deviation.

Question Image

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 2

Diagrams (a) and (b) in the figure below show the refraction of a ray of light of single colour through a prism and a parallel sided glass slab respectively. In what way the direction of the emergent ray in the two cases differ with respect to the incident ray? Explain your answer.

Question Image

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 3

Define the term angle of deviation

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 5

What do you understand by the deviation produced by a prism? Why is it caused? State three factors on which the angle of deviation depends.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 6

How does the angle of deviation produced by a prism change with increase in the angle of incidence. Draw a curve showing the variation in the angle of deviation with the angle of incidence at a prism surface.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 6

Using the curve showing the variation in the angle of deviation with the angle of incidence at a prism surface, how do you infer that for a given prism, the angle of minimum deviation

δ_{m i n}

is unique for a given light.

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 4 - Refraction of Light at Plane Surfaces>EXERCISE-4(B)>Q 7

The deviation produced by a prism is independent of the angle of incidence and is same for all the colours of light .

A ray of light of wavelength 5400 Å suffers refraction from air to glass. Taking ηga=32, find the wavelength of light in glass.

Important Questions on Refraction of Light at Plane Surfaces

Learn and Prepare for any exam you want !

A ray of light of wavelength $5400 Å$ suffers refraction from air to glass. Taking ${}_{a}η_{g} = \frac{3}{2}$ , find the wavelength of light in glass.