Class 12 Physics MCQ Test – Ray Optics and Optical Instruments (Chapter 9) | Full Chapter Test

Class 12 Physics

Chapter 9: Ray Optics & Optical Instruments - Full Test

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1. Mirror formula is:

1/f = 1/v + 1/u f = u + v 1/f = v/u v = uf

2. Critical angle depends on:

Angle of incidence Refractive index Thickness Wavelength only

3. Power of lens is +2D. Focal length:

0.5 m 2 m -0.5 m 1 m

4. Condition for total internal reflection:

Dense to rarer, i > ic Rarer to denser i < ic Always occurs

5. Magnification of mirror is:

v/u u/v uv v+u

6. Lens maker formula relates:

f, R1, R2 u, v n only P only

7. Combination of lenses in contact gives:

P = P1 + P2 f = f1 + f2 P = P1P2 f = f1f2

8. Optical fibre works on:

Refraction TIR Reflection Diffraction

9. Angular magnification of telescope depends on:

f objective & eyepiece wavelength aperture only none

10. Prism deviation depends on:

Angle of prism & refractive index Thickness only Colour only Distance only

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