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- Multiple ChoicePlease save your changes before editing any questions.
Which waves are longitudinal?
A gamma rays
B light waves
C ultrasound waves
D X-rays
- Multiple ChoicePlease save your changes before editing any questions.
A parallel beam of light is incident on a thin diverging lens. The focal length of the lens is FL, as shown in the diagram.
Which ray diagram shows the beam after it has passed through the lens?
- Multiple ChoicePlease save your changes before editing any questions.
The following lists show colours of the spectrum. Which list shows these colours in order of increasing frequency?
A blue, violet, red, orange, yellow, green
B green, blue, violet, red, orange, yellow
C red, orange, violet, yellow, green, blue
D red, orange, yellow, green, blue, violet
- Multiple ChoicePlease save your changes before editing any questions.
Four sound waves are displayed on the screen of a cathode-ray oscilloscope. Which sound wave gets louder and has a pitch that decreases?
- Multiple ChoicePlease save your changes before editing any questions.
A swimming pool is lit by an underwater light. A ray of light is incident on the water surface. What is the correct path for the ray of light?
a
b
c
d
- Multiple ChoicePlease save your changes before editing any questions.
What is a feature of red light compared with that of violet light?
A A prism deviates red light more.
B Red light has a lower frequency.
C Red light has a shorter wavelength.
D The speed of red light in a vacuum is smaller.
- Multiple ChoicePlease save your changes before editing any questions.
Ultrasound is used to clean jewellery in a liquid. What is another use of ultrasound?
A optical fibre communication
B pre-natal scanning
C sunbeds
D telephone communications
- Multiple ChoicePlease save your changes before editing any questions.
What is the ratio of the longest sound wavelength audible to a healthy human ear to the shortest?
A 20 : 1
B 1000 : 1
C 10 000 :1
D 20 000 :1
- Multiple ChoicePlease save your changes before editing any questions.
The displacement-distance and displacement-time graphs are for a water wave in a ripple tank.
What is the speed of the water wave?
A 0.02cm/ s
B 0.08cm/ s
C 25cm/ s
D 50cm/ s
- Multiple ChoicePlease save your changes before editing any questions.
A wave of frequency 13 000Hz travels 1300m in 4.0s. What is the wavelength of the wave?
A 0.025m
B 0.40m
C 2.5 m
D 40 m
- Multiple ChoicePlease save your changes before editing any questions.
A shoe shop puts a mirror on the wall so that customers can look at their shoes. The length of the mirror is 50cm. A customer has eyes 150cm above ground level.
The bottom of the mirror is at height h above the ground. What is the smallest value of h that allows the customer to see an image of his shoes in the mirror?
A 0
B 25cm
C 50cm
D 75cm