Critical Angle

Infrared light travels in optical fibers at high speed due to

• refraction

• dispersion

• total internal reflection

• refraction and dispersion

Tags

NGSS.HS-PS4-5

Which of the phenomena below is NOT involved in the formation of rainbows?

• Reflection

• Refraction

• Diffraction

• Dispersion

Which of the following is/are the condition(s) for total internal reflection to take place?

• I only

• II only

• I and II only

• II and III only

Which of the following phenomena causes the formation of the rainbow?

• I and II only

• I and III only

• II and III only

• I,II and III

Tags

NGSS.HS-PS4-3

Light travels through a glass block as shown below.

Which angle is the critical angle for light in the glass?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

Three rays of light are incident on the boundary between a glass block and air. The angles of incidence are different.What is the possible critical angle for light in the glass?

• 15^o

• 30^o

• 45^o

• 60^o

Calculate the critical angle for Zircon which has a refractive index of n= 2.

• 30^o

• 45^o

• 60^o

• 90^o

Light traveling in glass is incident on a glass-air boundary. The angle of incidence of the light is greater than the critical angle. Which arrow shows the direction of the light after it is incident on the boundary?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which of the following statements is correct?

• Total internal reflection only occurs when light travels from air to glass

• The larger the refractive index of glass, the larger is the critical angle

• When total internal reflection occurs, the angle of incidence is equal to the angle of reflection

• When total internal reflection occurs, the angle of incidence is less than the critical angle.

The figure below is an optical phenomenon caused by the refraction of light. What is this effect called?

• Dispersion

• Mirage

• Rainbow

• Diffraction

Tags

NGSS.MS-PS4-2