Red light is used for signals because it has –

Related MCQs

• Danger signals are generally red as red light –
• In sunlight, a rose appears red. In green light, the same rose appears –
• When a strong beam of light is passed through a colloidal solution, the light will –
• Stars appear twinkling because of ______ of light.
• The mercury and sodium street lamps light up because of –
• Red is used as an emergency or danger signal as –
• The audio signals of TV are :
• The audio signals of TV are –
• In radio-communication, the signals emitted by transmitting antenna are reflected on –
• For a ray of light to suffer total internal reflection it has to pass from –