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The distance of an object from the focus of a convex mirror of radius of curvature 'a' is 'b'. Then the distance of the image from the focus is:

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Important Questions on Ray Optics

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 83
The largest distance of the image of a real object from a convex mirror of focal length 20 cm can be:
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 84
Which of the following can form diminished, virtual and erect image of your face?
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 85
I is the image of a point object O formed by spherical mirror, then which of the following statement is incorrect
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 86
An object is placed at a distance u from a concave mirror and its real image is received on a screen placed at a distance of v from the mirror. If f is the focal length of the mirror, then the graph between 1v versus 1u is
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 87
A real inverted image in a concave mirror is represented by graph (u, v, f are coordinates)
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 88
When observed from the earth the angular diameter of the sun is 0.5 degree. The diameter of the image of the sun, when formed in a concave mirror of focal length 0.5m will be about
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 89
The wavelength of light in a vacuum is 6000 Aº and in a medium it is 4000 Aº. The refractive index of the medium is:
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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 90
A ray of light passes from a vacuum into a medium of refractive index n. If the angle of incidence is twice the angle of refraction, then the angle of incidence is: