Advertisements
Advertisements
प्रश्न
Water is optically denser than glass.
पर्याय
True
False
Advertisements
उत्तर
False.
Water is optically denser than air.
APPEARS IN
संबंधित प्रश्न
What is refraction of light?
The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is:
What is meant by ‘refraction of light’?
Light travels more quickly through water than through glass.
- Which is optically denser: water or glass?
- If a ray of light passes from glass into water, which way will it bend: towards the normal or away from the normal?
Air is optically .......... than glass.
Write scientific reason.
The bottom of a pond appears raised.
Numerical problems.
The speed of light in water is 2.25 × 108 ms–1. If the speed of light in vacuum is 3 × 108 ms–1, calculate the refractive index of water.
Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged.
Her friend noted the following observations from this demonstration:
- Glass is optically rarer than air.
- Air and glass allow light to pass through them with the same velocity.
- Air is optically rarer than glass.
- Speed of light through a denser medium is faster than that of a rarer medium.
- The ratio: sin of angle of incidence in the first medium to the ratio of sin of angle of refraction in the second medium, gives the refractive index of the second material with respect to the first one.
Which one of the combinations of the above statements given below is correct.
Which object use the reflection of light?
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
