Q.71)-Protanopia is a kind of colourblindness, in which defected person can't see the colour
- Green
- Red
- Blue
- All of the above
Q.72)-The plate of blue glass appears blue in sunlight because
- It absorb the blue light
- It transmits the blue light
- It absorbs all the colours including blue
- Transmits all the colours including blue
Q.73)-Photon is the fundamental unit/quantum of
- Gravitation
- Electricity
- Magnetism
- Light
Q.74)-Light beam which is highly directional is called
- Eraser
- Grazer
- Maser
- Laser
Q.75)-Persistence of vision is the principle behind
- Binocular
- Camera
- Periscope
- Cinema
Q.76)-Which of the following is responsible for the working of newton's colour disc experiment
- Formation of pure spectra
- Formation of impure spectra
- Persistence of vision
- Principle of complementary colour
Q.77)-Soloar cells work on the principle of
- Photovoltaic effect
- Photoelectric effect
- Photoconductive effect
- Photosynthesis
Q.78)-A light year is a unit of
- Time
- Distance
- Speed of light
- Intensity of light
Q.79)-Ozone layer above the surface of earth provides a shield against
- X-rays
- Ultra violet rays
- Gamma rays
- Infrared rays
Q.80)-The primary colours in photography are
- Red, blue, yellow
- Red, yellow, green
- Red, blue, green
- Blue, yellow, green