A man standing in front of special mirror finds his image having a small face,big tummy andlegs of normal size .what are the shapes three parts of mirror? Q.2. A diverging lens of focal length 15cm forms an image of 10cm from the lens.Draw a scale ,diagram for the formation of image. Q.3.Why a mirror does has one principal focus while a lens has two principal foci? Q.4. State the significance of opitcal centre. Q.5.At What angle a ray of light should strike the surface of glass, So that it doesnot suffer any refraction?
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1. first part - convex mirror
second part concave mirror
third part plain mirror
3. as mirror is part of spherical reflecting surface where as lens is transparent material bound by two surfaces, so each surface has its
focus.
4. The central point of lens on principal axis is called optical centre. A ray of light passing through optical centre passes through optical centre undeviated.
5. 90 degrees
second part concave mirror
third part plain mirror
3. as mirror is part of spherical reflecting surface where as lens is transparent material bound by two surfaces, so each surface has its
focus.
4. The central point of lens on principal axis is called optical centre. A ray of light passing through optical centre passes through optical centre undeviated.
5. 90 degrees
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