Question

The critical angle between a gemstone and air is 30.9 degrees. Which of the following is...

  1. The critical angle between a gemstone and air is 30.9 degrees. Which of the following is the speed of light in the gemstone?

    1.24 x 108 m/s

    1.99 x 108 m/s

    2.25 x 108 m/s

    1.54 x 108 m/s

2.

An object is placed 8 cm away from a mirror of focal length 13 cm. Calculate the image distance.

3. A woman stands 1.8 meters from a convex mirror with focal length -0.7 meters. If she is 1.6 meters tall, calculate the height of her reflection.

4.

Two adjacent bottles are 260 m away and 8 cm apart. The light has wavelength 550 nm and your eye has diameter 2.5 mm. Can you differentiate between the two bottles?

Yes

No

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