Heat, Light and Sound

Heat transfer, reflection/refraction of light and sound waves.

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Q1 · Heat, Light and Sound · EASY
A student observes that a steel spoon placed in a cup of hot tea becomes hot after some time. Which method of heat transfer is primarily responsible for this?
Q2 · Heat, Light and Sound · MEDIUM
A teacher demonstrates that when light passes from air into a glass block, it bends towards the normal line. What is this phenomenon called?
Q3 · Heat, Light and Sound · MEDIUM
In a science experiment, students find that sound travels faster in steel railway tracks than in air. If sound travels at approximately 330 m/s in air at room temperature, approximately how much faster does it travel in steel?
Q4 · Heat, Light and Sound · HARD
A glass prism splits white light into seven colours when light passes through it. The refractive index of glass is maximum for violet light and minimum for red light. Based on this, which statement correctly explains why different colours separate?
Q5 · Heat, Light and Sound · EASY
When sunlight passes through a prism, it splits into seven colors. This phenomenon is known as: