Physics
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the:
- reflection
- refraction
- dispersion
- total internal reflection
Related Questions
When a ray of light travels normal to the given surface, then the angle of refraction is:
- 180°
- 90°
- 0°
- 45°
(a) When does the nucleus of an atom tend to become radioactive?
(b) Name a single pulley in which displacement of load and effort is not the same.
(c) State one advantage of this pulley.
(a) What is the position of centre of gravity of a triangular lamina?
(b) When this triangular lamina is suspended freely from any one vertex, what is the moment of force produced by its own weight in its rest position?
Specific heat capacity of a substance X is 1900 Jkg-1°C-1 means:
- Substance X absorbs 1900 J for 1°C rise in temperature
- 1 kg of substance X absorbs 1900 J heat for 1°C rise in temperature
- 1 kg of substance X absorbs 1900 J heat to increase the temperature
- 1 kg of substance X absorbs 1900 J heat to cool down by 1°C