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

• centre of curvature

• the focal point

• optic centre

• Plane of the lens

Which describes a convex lens?

• triangular in shape

• more transparent at the middle

• thicker at the edges than at the middle

• thicker at the middle than at the edges

What does the word "diverging" mean?

• to spread apart
• to come together
• parallel
• perpendicular

Tags

NGSS.MS-PS4-2

Which lens represents the path of light through a diverging lens?

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Equation for refraction oflight at curved surface is

• n₁/u - n₂/v = (n₂ - n₁)/R

• n₂/u - n₁/v = (n₂ + n₁)/R

• n₂/v - n₁/u = (n₂ - n₁)/R

• 1/f = 1/v - 1/u

------ lens is thin at the middle and thicker at the edges.

• Biconvex

• plano convex

• Biconcave

• glass slab

Distances measured in the direction of the incident ray are taken as

• positive

• negative

• either positive or negative

• depends on lens

Any ray which is passing along principal axis of a lens is -------

• passing through focus after refraction

• un deviated

• passing parallel to the principal axis after refracion

• can't pass

Focal plane is the plane which is ..... to the principla axis -----

• parallel; at focus

• parallel; at optic centre

• perpendicular; at focus

• perpendicular; at optic centre

Focal length of a lens depends on which of the following factore?

• Radii of curvature

• material of the lens

• medium inwhich the lens is placed

• all the above