AP EAMCET · PHYSICS · Dual Nature of Matter
Light falls on a non-reflecting surface normally. If the average force exerted on a surface with area \(15 \mathrm{~cm}^2\) during 20 minute time interval is \(10^{-6} \mathrm{~N}\), then energy flux of light is
(Velocity of light \(=3 \times 10^8 \mathrm{~ms}^{-1}\) )
- A \(20 \times 10^4 \mathrm{Wm}^{-2}\)
- B \(15 \times 10^4 \mathrm{Wm}^{-2}\)
- C \(25 \times 10^4 \mathrm{Wm}^{-2}\)
- D \(10 \times 10^4 \mathrm{Wm}^{-2}\)
Answer & Solution
Correct Answer
(A) \(20 \times 10^4 \mathrm{Wm}^{-2}\)
Step-by-step Solution
Detailed explanation
Radiation pressure on a totally absorbing (non reflecting) surface is Pressure \(=\frac{F}{A}=\frac{I}{c}\)...(i) Where, \(I=\) Intensity,\(c=\) speed of light it is given that,…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- A voltmeter of resistance \(R\) is to be used to measure the potential difference across a resistance ' \(r\) '. In which case the reading will be nearest to that in the absence of voltmeter?AP EAMCET 2020 Medium
- In a Carnot engine, the absolute temperature of the source is \(25 \%\) more than the absolute temperature of the sink. The efficiency of the engine isAP EAMCET 2024 Easy
- A particle of mass ' \(m\) ' at rest on a rough horizontal surface with a coefficient of friction ' \(\mu\) ' is given a velocity ' \(u\) '. The average power impaired by friction before it stopsAP EAMCET 2024 Medium
- A body is executing S.H.M. At a displacement its potential energy is and at a displacement its potential energy is . The potential energy at displacement isAP EAMCET 2022 Easy
- Find the stress developed inside a tooth cavity filled with copper when hot tea at temperature of \(57^{\circ} \mathrm{C}\) is drunk. You can take body (tooth) temperature to be \(37^{\circ} \mathrm{C}\) and \(\alpha=1.7 \times 10^{-5}{ }^{\circ} \mathrm{C}^{-1}\), bulk modulus for copper \(B=140 \times 10^9 \mathrm{Nm}^{-2}\).AP EAMCET 2020 Hard
- The two surfaces of a biconvex lens has same radii of curvatures. This lens is made of glass of refractive index 1.5 and has a focal length \(10 \mathrm{~cm}\) in air. The lens is cut into two equal halves along a plane perpendicular to its principal axis to yield two plano-convex lenses. The two pieces are glued such that the convex surfaces touch each other. If this combination lens is immersed in water (refractive index \(=\) \(4 / 3\) ), its focal length (in \(\mathrm{cm}\) ) is :AP EAMCET 2006 Medium
More PYQs from AP EAMCET
- \(\left|\begin{array}{ccc}a & b & c \\ a^2 & b^2 & c^2 \\ 1 & 1 & 1\end{array}\right|\) is not equal toAP EAMCET 2024 Medium
- The family of lines, forming an isosceles triangle with the lines \(3 x-4 y-2=0\) and \(12 x-5 y+6=0\), isAP EAMCET 2022 Hard
- If \(z=1+i \sqrt{3}\) then \(|\operatorname{Arg} z|+|\operatorname{Arg} \bar{z}|\) is equal toAP EAMCET 2010 Hard
- Which among the following is a possible product during cross aldol condensation between propanal (as electrophile) and butanal (as nucleophile)?AP EAMCET 2020 Hard
- The solution of \(x d y-y d x=\sqrt{x^2+y^2} d x\) when \(y(\sqrt{3})\) \(=1\) isAP EAMCET 2024 Hard
- Average \(\mathrm{C}-\mathrm{H}\) bond energy is \(416 \mathrm{~kJ} \mathrm{~mol}^{-1}\). Which of the following is correct?AP EAMCET 2004 Easy