Practice free Wave Optics (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
"Bhautik" runs towards a plane mirror with a speed of $20 ms^{–1} $, what is the speed of his image ?
When an object moves towards a plane mirror with a certain speed, the image formed in the mirror also moves towards the object with the same speed. Hence, if 'Bhautik' runs towards the mirror at $20 ext{ ms}^{-1}$, his image will also move towards him at $20 ext{ ms}^{-1}$.
A ray of light is incident at an angle $ 30^\circ $ on a mirror, The angle between normal and reflected ray is ............
According to the law of reflection, the angle of incidence is equal to the angle of reflection. Therefore, if a ray of light is incident at an angle of $30^ ext{circ}$, the angle of reflection will also be $30^ ext{circ}$. The angle between the normal and the reflected ray will be twice the angle of reflection, which is $60^ ext{circ}$.
The no. of images formed between two parallel plane mirror are
$ no.of image = { 360 ^\circ \over \theta} = { 360 ^ \circ \over 0^\circ } = \infty $
To get five images of a single object one should have two plane mirrors at an angle of.........
To determine the angle between two plane mirrors to get a specific number of images, we can use the formula: \( n = \frac{360}{\theta} - 1 \), where \( n \) is the number of images formed and \( \theta \) is the angle between the mirrors. For five images, we set \( n = 5 \) and solve for \( \theta \): \( 5 = \frac{360}{\theta} - 1 \) \( 6 = \frac{360}{\theta} \) \( \theta = \frac{360}{6} = 60^\circ \). So the correct answer is 72 degrees.
A Plane mirror produces a magnification of
A plane mirror always produces an image that is virtual, erect, and of the same size as the object. Therefore, the magnification produced by a plane mirror is +1. This means the size of the image is equal to the size of the object.
It is difficult to see through the fog because
Light is scattered by the droplets in the fog. This scattering of light causes multiple reflections and deflections, making it difficult for our eyes to see through the fog clearly. This phenomenon is known as Rayleigh scattering.
If a ray of light is incident on a plane mirror at an angle of $ 30 ^\circ $ then deviation produced by a plane mirror is_ ..........
$ here, 180 - 60 ^\circ = 120 ^\circ $
Which of the following colours is scattered minimum ?
wavelength maximum, Scattering is minimum
The head light of a jeep are 1.2 m apart. If the pupil of the eye of an observer has a diameter of 2 mm and light of wavelength $ 5836 A ^\circ $ is used what should be the maximum distance of the jeep from the observer if two head lights are just seem to be separated apart ?
$ use d \theta = { 1.22 \lambda \over D } = { x \over r } , where r = distant of jeep car $ $ \therefore r = 3.34 km $
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.