concave and convex lenses

Choose the TWO conditions are NOT correct for total internal reflection to take place

• The incident angle should be less than the critical angle

• The incident angle should be greater than the critical angle

• Light should travel from an optically denser medium to optically rarer medium

• Light should travel from optically rarer medium to an optically denser medium

Which diagram correctly describes the critical angle c for air-water surface?

• A

• B

• C

• D

see image

• A

• B

• C

• D

Where can you place an object in order to get a virtual image? Select all that apply.

• beyond 2F

• at 2F

• between F & 2F

• at F

• between F and the optical centre of the lens

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

Tags

NGSS.HS-PS4-5

___ is when light travels through a material and bends.

• Diffraction
• Dispersion
• Mirage
• Refraction

Tags

NGSS.MS-PS4-2

Which describes a convex lens?

• triangular in shape
• more transparent in the middle
• thicker on the edges than in the middle
• thicker in the middle than on the edges

Is a convex lens thicker or thinner in the middle?

• Thicker 
• Thinner 

This diagram best represents 

• reflection
• refraction
• absorption
• diffusion

Tags

NGSS.MS-PS4-2

How does light travel

• It curves around corners
• Really slow
• In a straight line
• In circles

Tags

NGSS.HS-PS4-3