| 1 |
The units of magnifying power of microscope or telescope are. |
- A. Metre
- B. m<sup>-1</sup>
- C. dioptre
- D. No unit
|
| 2 |
The light signal in Opticla fiber must be regenerated by advice called. |
- A. Regenerator
- B. Generator
- C. Repeater
- D. Diode
|
| 3 |
The minimum distance from eye at which an object appears to be distinct is |
- A. Near point
- B. Focal length
- C. Image distance from lens
- D. Object distance from lens
|
| 4 |
The Detector in Photo phone is made up of. |
- A. Cadmium
- B. Germanium
- C. Selenium
- D. Silicon
|
| 5 |
If an object is placed with in the focal length of a convex lens, its image is formed. |
- A. Real
- B. Inverted
- C. Virtual
- D. Smaller than object
|
| 6 |
The final image seen through ey piece in telescope is. |
- A. Real, enlarge and inverted
- B. Vertual, enlarge and erect
- C. Virtual, enlarge and inverted
- D. In Real, enlarge and erect
|
| 7 |
The speed of light was measured correctly by |
- A. Galileo
- B. Michelson
- C. Newton
- D. Maxwell
|
| 8 |
A convex lens can be used as |
- A. Simple microscope
- B. Compound microscope
- C. Telescope
- D. Spectrometer
|
| 9 |
__ will travel faster than other through an optical fibre. |
- A. Ultraviolet light
- B. Visible light
- C. Infrared light
- D. White light
|
| 10 |
The location of near point changes with |
- A. Age
- B. Size of the eye
- C. Sharpness of the eye
- D. None of these
|