NDA || RAY OPTICS

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Question 1

Which one of the following statements is correct for a plane mirror?

• AIts focal length is zero
• BThe size of the image of an object placed in front of the mirror is slightly less than that of the object.
• CThe image is virtual, erect and laterally inverted
• DIts focal length is 200 cm

Question 2

Which mirror can produce a real image of a real object?

• AConcave mirror
• BConvex mirror
• CPlane mirror
• DConvex lens

Question 3

Find the focal length of the lens.

• A10cm
• B15cm
• C20cm
• D25cm

Question 4

The image of an object formed in a concave mirror is?

• AReal, inverted and of the same size as the object when it lies in between the center of curvature and focus.
• BNot real, large and proportional.
• CReal, erect and diminished if the object lies beyond the center of curvature.
• DReal, inverted and diminished if the object lies beyond the center of curvature.

Question 5

In which part of the human eye the image is formed ?

• Apupil
• BCornea
• Cretina
• Diris

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