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| Question | Answer |
| v = f x __________ | wavelength |
| The critical angle for glass - air interface | 42 degree |
| Real image is __________ with respect to the object | inverted |
| At infinity image size ? | highly diminished |
| The band of colours seen on passing white light through a prism is _____ | spectrum |
| Dispersion of white light occurs at the __________surface of prism | first |
| White light is ____in nature | polychromatic |
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