General
Easy
Physics-

Light wave enters from medium 1 to medium 2. Its velocity in 2nd medium is double from 1st. For total internal reflection the angle of incidence must be greater than

Physics-General

  1. 45 to the power of ring operator
  2. 60 to the power of ring operator
  3. 30 to the power of ring operator  
  4. 90 to the power of ring operator

    Answer:The correct answer is: 30 to the power of ring operator

    Book A Free Demo

    +91

    Grade

    Related Questions to study

    General
    maths-

    If the function not stretchy integral subscript 0 end subscript superscript x end superscript blankf(x) dt → 5 as |x| → I, then the value of ‘a’ so that the equation 2x + not stretchy integral subscript 0 end subscript superscript x end superscript blankf(t) dt = a has at least two roots of opposite signs in (-1, 1) is

    If the function not stretchy integral subscript 0 end subscript superscript x end superscript blankf(x) dt → 5 as |x| → I, then the value of ‘a’ so that the equation 2x + not stretchy integral subscript 0 end subscript superscript x end superscript blankf(t) dt = a has at least two roots of opposite signs in (-1, 1) is

    maths-General
    General
    maths-

    In straight triangle A B C comma fraction numerator a left parenthesis cos invisible function application B plus cos invisible function application C right parenthesis over denominator 2 left parenthesis b plus c right parenthesis end fraction equals

    In straight triangle A B C comma fraction numerator a left parenthesis cos invisible function application B plus cos invisible function application C right parenthesis over denominator 2 left parenthesis b plus c right parenthesis end fraction equals

    maths-General
    General
    chemistry-

    On Bohr’s stationary orbits -

    On Bohr’s stationary orbits -

    chemistry-General
    General
    chemistry-

    For a valid Bohr orbit, its cicumfrence should be -

    For a valid Bohr orbit, its cicumfrence should be -

    chemistry-General
    General
    maths-

    Let f : [-10, 10] →R, where f(x) = sin x + open square brackets fraction numerator x to the power of 2 end exponent over denominator a end fraction close square brackets be an odd function. Then set of values of parameter a is/are

    Let f : [-10, 10] →R, where f(x) = sin x + open square brackets fraction numerator x to the power of 2 end exponent over denominator a end fraction close square brackets be an odd function. Then set of values of parameter a is/are

    maths-General
    General
    maths-

    In straight triangle A B C comma left parenthesis a plus b plus c right parenthesis open parentheses tan invisible function application A over 2 plus tan invisible function application B over 2 close parentheses equals

    In straight triangle A B C comma left parenthesis a plus b plus c right parenthesis open parentheses tan invisible function application A over 2 plus tan invisible function application B over 2 close parentheses equals

    maths-General
    General
    maths-

    The quadratic equation whose roots are I and m where l =lim for theta not stretchy rightwards arrow 0 of   open parentheses fraction numerator 3 sin space theta minus 4 sin cubed space theta over denominator theta end fraction close parentheses m equals lim for theta not stretchy rightwards arrow 0 of   open parentheses fraction numerator 2 tan space theta over denominator theta open parentheses 1 minus tan squared space theta close parentheses end fraction close parentheses is

    The quadratic equation whose roots are I and m where l =lim for theta not stretchy rightwards arrow 0 of   open parentheses fraction numerator 3 sin space theta minus 4 sin cubed space theta over denominator theta end fraction close parentheses m equals lim for theta not stretchy rightwards arrow 0 of   open parentheses fraction numerator 2 tan space theta over denominator theta open parentheses 1 minus tan squared space theta close parentheses end fraction close parentheses is

    maths-General
    General
    chemistry-

    Arrange the following particles in increasing order of values of e/m ratio: Electron (e), proton (p), neutron (n) and α-particle (α) -

    Arrange the following particles in increasing order of values of e/m ratio: Electron (e), proton (p), neutron (n) and α-particle (α) -

    chemistry-General
    General
    maths-

    In straight triangle A B C comma open parentheses fraction numerator b minus c over denominator a end fraction close parentheses sin invisible function application open parentheses fraction numerator B plus C over denominator 2 end fraction close parentheses equals

    In straight triangle A B C comma open parentheses fraction numerator b minus c over denominator a end fraction close parentheses sin invisible function application open parentheses fraction numerator B plus C over denominator 2 end fraction close parentheses equals

    maths-General
    General
    physics-

    An antenna behaves as resonant circuit only when its length is

    An antenna behaves as resonant circuit only when its length is

    physics-General
    General
    maths-

    Lt subscript x not stretchy rightwards arrow 0 end subscript space fraction numerator 1 over denominator sin squared begin display style space end style x end fraction minus fraction numerator 1 over denominator sinh squared space x end fraction equals

    Lt subscript x not stretchy rightwards arrow 0 end subscript space fraction numerator 1 over denominator sin squared begin display style space end style x end fraction minus fraction numerator 1 over denominator sinh squared space x end fraction equals

    maths-General
    General
    maths-

    If fraction numerator b over denominator c plus a end fraction plus fraction numerator c over denominator a plus b end fraction equals 1then

    If fraction numerator b over denominator c plus a end fraction plus fraction numerator c over denominator a plus b end fraction equals 1then

    maths-General
    General
    maths-

    L t subscript n not stretchy rightwards arrow straight infinity end subscript fraction numerator n open parentheses 1 cubed plus 2 cubed plus midline horizontal ellipsis times plus n cubed close parentheses squared over denominator open parentheses 1 squared plus 2 squared plus midline horizontal ellipsis plus n squared close parentheses cubed end fraction equals

    L t subscript n not stretchy rightwards arrow straight infinity end subscript fraction numerator n open parentheses 1 cubed plus 2 cubed plus midline horizontal ellipsis times plus n cubed close parentheses squared over denominator open parentheses 1 squared plus 2 squared plus midline horizontal ellipsis plus n squared close parentheses cubed end fraction equals

    maths-General
    General
    maths-

    L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator x 10 to the power of x minus x over denominator 1 minus cos space x end fraction equals

    L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator x 10 to the power of x minus x over denominator 1 minus cos space x end fraction equals

    maths-General
    General
    maths-

    L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator x left parenthesis 1 plus a cos invisible function application x right parenthesis minus b sin invisible function application x over denominator x cubed end fraction equals 1 text  then  end text straight a equals comma straight b equals

    L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator x left parenthesis 1 plus a cos invisible function application x right parenthesis minus b sin invisible function application x over denominator x cubed end fraction equals 1 text  then  end text straight a equals comma straight b equals

    maths-General