REET · Mathematics and Science (Level 2)
Heat, Light and Sound
Heat transfer, reflection/refraction of light and sound waves.
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Take a full mock →Q1 · Heat, Light and Sound · EASY
A student performs an experiment to observe the reflection of light. She places a plane mirror on a table and shines a torch on it at an angle. According to the law of reflection, what can she conclude about the angle of incidence and the angle of reflection?
Q2 · Heat, Light and Sound · MEDIUM
A glass tumbler containing cold water is kept on a table in a room. After some time, water droplets appear on the outer surface of the tumbler. Which mode of heat transfer is primarily responsible for cooling the air around the tumbler and causing condensation?
Q3 · Heat, Light and Sound · HARD
A tuning fork of frequency 512 Hz is vibrating in air at 20 degrees Celsius where the speed of sound is approximately 343 m/s. The fork is then taken to a hill station where the temperature drops to 0 degrees Celsius and the speed of sound becomes approximately 331 m/s. What happens to the wavelength of the sound produced by the tuning fork at the hill station compared to its wavelength at 20 degrees Celsius?
Q4 · Heat, Light and Sound · MEDIUM
When a ray of light travels from a denser medium to a rarer medium, it: