Class 10| 10. Light Reflection and Refraction |Refraction

The velocity of light in vacuum is _______ m/s

• 3x10⁸

• 3x10¹²

• 3x10⁶

• 3x10¹⁰

We can see objects because of_______

• reflection
• refraction
• transmission
• diffraction

Tags

NGSS.MS-PS4-2

How does light behave as it enters these mediums?

• continue its path as straight line.
• bends toward the normal
• bends away from the normal
• reflects

Absolute refractive index of any medium is always _______.

• less than 1
• greater than 1
• 1
• 0

Swimming pools and the ocean look shallower than they really are due to:

• reflection 
• dispersion
• refraction
• total internal reflection

The formula to calculate the refractive index is

• n=cv
• n=v/c
• n=c/v
• v=nc

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

Tags

NGSS.MS-PS4-2

Light travels through a liquid at 2.25 x 10⁸ m/s. What is the absolute refractive index of the liquid?

• 1.33

• 1.0

• 1.523

• 2.45

Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

Tags

NGSS.HS-PS4-1

The point where the rays parallel to the principal axis meet after refraction by a convex lens is known as its....

• Fire

• the focal point

• refraction

• Plane of the lens