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CBSE Notes 2011-2012 » X-Science-Term2

Light - Reflection and Refraction

An object is placed at a distance of 30 cm from a concave lens of focal length 10 cm. The position o...

Multiple choice question

An object is placed at a distance of 30 cm from a concave
lens of focal length 10 cm. The position of image from the
optical centre is

If four different colours of light fall parallel to the principal axis of a convex lens, the number ...

Multiple choice question

If four different colours of light fall parallel to the principal
axis of a convex lens, the number of points of convergence
on the axis will be

All the rays passing through the optical centre of a concave lens will go

Multiple choice question

All the rays passing through the optical centre of a concave
lens will go

If a convergent beam falls on a plane mirror the image formed is

Multiple choice question

If a convergent beam falls on a plane mirror the image
formed is

If the speed of light in a medium is 2 x 108 m/s, its refractive index is

Multiple choice question

If the speed of light in a medium is 2 x 108 m/s, its refractive
index is

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal l...

Multiple choice question

An object at a distance of 30 cm from a concave mirror
gets its image at the same point. The focal length of the
mirror is

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