NEET UG 2021 — Physics Optics
A point object is placed at a distance of 60cm from a convex lens of focal length 30cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40cm from it, the final image would be formed at a distance of :
Held on 30 Apr 2021 · Verified 9 Jul 2026.
20cm from the lens, it would be a real image.
30cm from the lens, it would be a real image.
30cm from the plane mirror, it would be a virtual image.
20cm from the plane mirror, it would be a virtual image.
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The refractive index of glass is 1.5. The speed of light in glass is:
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A microscope has an objective of focal length 2 cm , eyepiece of focal length 4 cm and the tube length of 40 cm . If the distance of distinct vision of eye is 25 cm , the magnification in the microscope is :
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The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at $22.5^{\circ}$ from the polarization axis of one of the polaroid, is ( $\mathrm{I}_0$ is the intensity of polarised light after passing through the first polaroid):
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